diff --git a/build.gradle b/build.gradle
index b457a17..b3d7bda 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@ plugins {
 }
 
 group = 'me.skymc'
-version = '5.08'
+version = '5.09'
 
 sourceCompatibility = 1.8
 targetCompatibility = 1.8
diff --git a/src/main/scala/io/izzel/taboolib/common/event/PlayerJumpEvent.java b/src/main/scala/io/izzel/taboolib/common/event/PlayerJumpEvent.java
index ca6fed1..fac0484 100644
--- a/src/main/scala/io/izzel/taboolib/common/event/PlayerJumpEvent.java
+++ b/src/main/scala/io/izzel/taboolib/common/event/PlayerJumpEvent.java
@@ -1,46 +1,17 @@
 package io.izzel.taboolib.common.event;
 
-import org.bukkit.Bukkit;
+import io.izzel.taboolib.module.event.EventCancellable;
 import org.bukkit.entity.Player;
-import org.bukkit.event.Cancellable;
-import org.bukkit.event.Event;
-import org.bukkit.event.HandlerList;
 
-public class PlayerJumpEvent extends Event implements Cancellable {
+public class PlayerJumpEvent extends EventCancellable<PlayerJumpEvent> {
 
-    private static final HandlerList handlers = new HandlerList();
-    private boolean isCancelled;
     private Player player;
 
     public PlayerJumpEvent(Player player) {
         this.player = player;
     }
 
-    public static HandlerList getHandlerList() {
-        return handlers;
-    }
-
     public Player getPlayer() {
         return this.player;
     }
-
-    public PlayerJumpEvent call() {
-        Bukkit.getPluginManager().callEvent(this);
-        return this;
-    }
-
-    @Override
-    public boolean isCancelled() {
-        return this.isCancelled;
-    }
-
-    @Override
-    public void setCancelled(boolean e) {
-        this.isCancelled = e;
-    }
-
-    @Override
-    public HandlerList getHandlers() {
-        return handlers;
-    }
 }
diff --git a/src/main/scala/io/izzel/taboolib/common/listener/ListenerPlayerJump.java b/src/main/scala/io/izzel/taboolib/common/listener/ListenerPlayerJump.java
index 18aa56b..83b354c 100644
--- a/src/main/scala/io/izzel/taboolib/common/listener/ListenerPlayerJump.java
+++ b/src/main/scala/io/izzel/taboolib/common/listener/ListenerPlayerJump.java
@@ -28,13 +28,12 @@ public class ListenerPlayerJump implements Listener {
                 // 不在冷却
                 && !cooldown.isCooldown(e.getPlayer().getName())) {
 
-            PlayerJumpEvent event = new PlayerJumpEvent(e.getPlayer()).call();
-            if (event.isCancelled()) {
+            new PlayerJumpEvent(e.getPlayer()).call().ifCancelled(() -> {
                 // 返回位置
                 e.setTo(e.getFrom());
                 // 重置冷却
                 cooldown.reset(e.getPlayer().getName());
-            }
+            });
         }
     }
 }
diff --git a/src/main/scala/io/izzel/taboolib/module/command/base/BaseMainCommand.java b/src/main/scala/io/izzel/taboolib/module/command/base/BaseMainCommand.java
index 5cc388c..596957f 100644
--- a/src/main/scala/io/izzel/taboolib/module/command/base/BaseMainCommand.java
+++ b/src/main/scala/io/izzel/taboolib/module/command/base/BaseMainCommand.java
@@ -110,7 +110,9 @@ public abstract class BaseMainCommand implements CommandExecutor, TabExecutor {
         sender.sendMessage(getEmptyLine());
     }
 
-    abstract public String getCommandTitle();
+    public String getCommandTitle() {
+        return "§e§l----- §6§l" + registerCommand.getPlugin().getName() + " Commands §e§l-----";
+    }
 
     @Override
     public List<String> onTabComplete(CommandSender commandSender, Command command, String s, String[] args) {
diff --git a/src/main/scala/io/izzel/taboolib/module/event/EventCancellable.java b/src/main/scala/io/izzel/taboolib/module/event/EventCancellable.java
new file mode 100644
index 0000000..ae03a1a
--- /dev/null
+++ b/src/main/scala/io/izzel/taboolib/module/event/EventCancellable.java
@@ -0,0 +1,53 @@
+package io.izzel.taboolib.module.event;
+
+import org.bukkit.event.Cancellable;
+
+/**
+ * @Author sky
+ * @Since 2019-10-22 10:41
+ */
+public abstract class EventCancellable<T extends EventCancellable> extends EventNormal implements Cancellable {
+
+    private boolean cancelled;
+
+    public T nonCancelled(Runnable runnable) {
+        if (nonCancelled()) {
+            try {
+                runnable.run();
+            } catch (Throwable t) {
+                t.printStackTrace();
+            }
+        }
+        return (T) this;
+    }
+
+    public T ifCancelled(Runnable runnable) {
+        if (isCancelled()) {
+            try {
+                runnable.run();
+            } catch (Throwable t) {
+                t.printStackTrace();
+            }
+        }
+        return (T) this;
+    }
+
+    @Override
+    public T call() {
+        return (T) super.call();
+    }
+
+    @Override
+    public void setCancelled(boolean cancelled) {
+        this.cancelled = cancelled;
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return cancelled;
+    }
+
+    public boolean nonCancelled() {
+        return !cancelled;
+    }
+}
diff --git a/src/main/scala/io/izzel/taboolib/module/event/EventNormal.java b/src/main/scala/io/izzel/taboolib/module/event/EventNormal.java
new file mode 100644
index 0000000..814217e
--- /dev/null
+++ b/src/main/scala/io/izzel/taboolib/module/event/EventNormal.java
@@ -0,0 +1,47 @@
+package io.izzel.taboolib.module.event;
+
+import io.izzel.taboolib.util.Ref;
+import io.izzel.taboolib.util.Reflection;
+import org.bukkit.Bukkit;
+import org.bukkit.event.Event;
+import org.bukkit.event.HandlerList;
+
+import java.lang.reflect.Field;
+
+/**
+ * @Author sky
+ * @Since 2019-10-22 10:25
+ */
+public abstract class EventNormal<T extends EventNormal> extends Event {
+
+    protected static final HandlerList handlers = new HandlerList();
+
+    protected static HandlerList getHandlerList() {
+        return handlers;
+    }
+
+    public T call() {
+        try {
+            Bukkit.getPluginManager().callEvent(this);
+        } catch (Throwable t) {
+            t.printStackTrace();
+        }
+        return (T) this;
+    }
+
+    public T async(boolean value) {
+        try {
+            Field asyncField = Reflection.getField(Event.class, true, "async");
+            Ref.forcedAccess(asyncField);
+            asyncField.setBoolean(this, value);
+        } catch (Throwable t) {
+            t.printStackTrace();
+        }
+        return (T) this;
+    }
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+}
diff --git a/src/main/scala/io/izzel/taboolib/module/lite/SimpleEquip.java b/src/main/scala/io/izzel/taboolib/module/lite/SimpleEquip.java
index e6d16d0..fa71c3d 100644
--- a/src/main/scala/io/izzel/taboolib/module/lite/SimpleEquip.java
+++ b/src/main/scala/io/izzel/taboolib/module/lite/SimpleEquip.java
@@ -1,12 +1,12 @@
 package io.izzel.taboolib.module.lite;
 
-import com.google.common.collect.Maps;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.EquipmentSlot;
 import org.bukkit.inventory.ItemStack;
 
 import java.util.Arrays;
 import java.util.Map;
+import java.util.stream.Collectors;
 
 /**
  * @Author 坏黑
@@ -14,23 +14,25 @@ import java.util.Map;
  */
 public enum SimpleEquip {
 
-    HAND(EquipmentSlot.HAND, -1),
+    HAND(EquipmentSlot.HAND, "mainhand", -1),
 
-    OFF_HAND(EquipmentSlot.OFF_HAND, 40),
+    OFF_HAND(EquipmentSlot.OFF_HAND, "offhand", 40),
 
-    FEET(EquipmentSlot.FEET, 36),
+    FEET(EquipmentSlot.FEET, "feet", 36),
 
-    LEGS(EquipmentSlot.LEGS, 37),
+    LEGS(EquipmentSlot.LEGS, "legs", 37),
 
-    CHEST(EquipmentSlot.CHEST, 38),
+    CHEST(EquipmentSlot.CHEST, "chest", 38),
 
-    HEAD(EquipmentSlot.HEAD, 39);
+    HEAD(EquipmentSlot.HEAD, "head", 39);
 
     private EquipmentSlot bukkit;
+    private String nms;
     private int slot;
 
-    SimpleEquip(EquipmentSlot bukkit, int slot) {
+    SimpleEquip(EquipmentSlot bukkit, String nms, int slot) {
         this.bukkit = bukkit;
+        this.nms = nms;
         this.slot = slot;
     }
 
@@ -50,16 +52,16 @@ public enum SimpleEquip {
         }
     }
 
+    public static SimpleEquip fromNMS(String nms) {
+        return Arrays.stream(values()).filter(tEquipment -> tEquipment.nms.equalsIgnoreCase(nms)).findFirst().orElse(null);
+    }
+
     public static SimpleEquip fromBukkit(EquipmentSlot bukkit) {
         return Arrays.stream(values()).filter(tEquipment -> tEquipment.bukkit == bukkit).findFirst().orElse(null);
     }
 
     public static Map<SimpleEquip, ItemStack> getItems(Player player) {
-        Map<SimpleEquip, ItemStack> map = Maps.newHashMap();
-        for (SimpleEquip equipment : values()) {
-            map.put(equipment, equipment.getItem(player));
-        }
-        return map;
+        return Arrays.stream(values()).collect(Collectors.toMap(equipment -> equipment, equipment -> equipment.getItem(player), (a, b) -> b));
     }
 
     // *********************************
@@ -72,6 +74,10 @@ public enum SimpleEquip {
         return bukkit;
     }
 
+    public String getNMS() {
+        return nms;
+    }
+
     public int getSlot() {
         return slot;
     }
diff --git a/src/main/scala/io/izzel/taboolib/module/nms/NMS.java b/src/main/scala/io/izzel/taboolib/module/nms/NMS.java
index e70c66a..fc0c315 100644
--- a/src/main/scala/io/izzel/taboolib/module/nms/NMS.java
+++ b/src/main/scala/io/izzel/taboolib/module/nms/NMS.java
@@ -1,12 +1,19 @@
 package io.izzel.taboolib.module.nms;
 
+import com.google.common.collect.Lists;
 import io.izzel.taboolib.module.inject.TInject;
+import io.izzel.taboolib.module.nms.nbt.NBTAttribute;
 import io.izzel.taboolib.module.nms.nbt.NBTCompound;
+import io.izzel.taboolib.module.nms.nbt.NBTList;
 import org.bukkit.Particle;
 import org.bukkit.entity.Entity;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
 
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.stream.Collectors;
+
 /**
  * @Author 坏黑
  * @Since 2018-11-09 14:38
@@ -47,4 +54,17 @@ public abstract class NMS {
     public ItemStack saveNBT(ItemStack itemStack, NBTCompound compound) {
         return _NBT(itemStack, compound);
     }
+
+    public List<NBTAttribute> getAttribute(ItemStack item) {
+        NBTCompound nbt = loadNBT(item);
+        return !nbt.containsKey("AttributeModifiers") ? Lists.newCopyOnWriteArrayList() : nbt.get("AttributeModifiers").asList().stream().map(element -> NBTAttribute.fromNBT(element.asCompound())).collect(Collectors.toCollection(CopyOnWriteArrayList::new));
+    }
+
+    public ItemStack setAttribute(ItemStack item, List<NBTAttribute> attributes) {
+        NBTCompound nbt = loadNBT(item);
+        nbt.put("AttributeModifiers", attributes.stream().map(NBTAttribute::toNBT).collect(Collectors.toCollection(NBTList::new)));
+        return saveNBT(item, nbt);
+    }
+
+    abstract public List<NBTAttribute> getBaseAttribute(ItemStack item);
 }
diff --git a/src/main/scala/io/izzel/taboolib/module/nms/NMSImpl.java b/src/main/scala/io/izzel/taboolib/module/nms/NMSImpl.java
index a5a089e..d177872 100644
--- a/src/main/scala/io/izzel/taboolib/module/nms/NMSImpl.java
+++ b/src/main/scala/io/izzel/taboolib/module/nms/NMSImpl.java
@@ -1,9 +1,13 @@
 package io.izzel.taboolib.module.nms;
 
+import com.google.common.collect.Lists;
+import com.google.common.collect.Multimap;
 import io.izzel.taboolib.Version;
 import io.izzel.taboolib.module.lite.SimpleReflection;
+import io.izzel.taboolib.module.nms.nbt.NBTAttribute;
 import io.izzel.taboolib.module.nms.nbt.NBTCompound;
 import io.izzel.taboolib.module.nms.nbt.NBTList;
+import io.izzel.taboolib.module.nms.nbt.NBTOperation;
 import io.izzel.taboolib.module.packet.TPacketHandler;
 import net.minecraft.server.v1_12_R1.ChatMessageType;
 import net.minecraft.server.v1_12_R1.EntityVillager;
@@ -28,6 +32,7 @@ import org.bukkit.inventory.meta.PotionMeta;
 import java.lang.reflect.Field;
 import java.util.List;
 import java.util.Map;
+import java.util.UUID;
 
 /**
  * @Author 坏黑
@@ -235,6 +240,29 @@ public class NMSImpl extends NMS {
         return new NBTCompound();
     }
 
+    @Override
+    public List<NBTAttribute> getBaseAttribute(ItemStack item) {
+        List<NBTAttribute> list = Lists.newArrayList();
+        Object nmsItem = CraftItemStack.asNMSCopy(item);
+        Object attr;
+        if (Version.isAfter(Version.v1_9)) {
+            attr = ((net.minecraft.server.v1_12_R1.ItemStack) nmsItem).getItem().a(net.minecraft.server.v1_12_R1.EnumItemSlot.MAINHAND);
+        } else {
+            attr = ((net.minecraft.server.v1_8_R3.ItemStack) nmsItem).getItem().i();
+        }
+        ((Multimap) attr).forEach((k, v) -> {
+            Object nbt = net.minecraft.server.v1_12_R1.GenericAttributes.a((net.minecraft.server.v1_12_R1.AttributeModifier) v);
+            list.add(new NBTAttribute(
+                    new UUID(((NBTTagCompound) nbt).getLong("UUIDMost"), ((NBTTagCompound) nbt).getLong("UUIDLeast")),
+                    String.valueOf(k),
+                    ((NBTTagCompound) nbt).getString("Name"),
+                    ((NBTTagCompound) nbt).getDouble("Amount"),
+                    NBTOperation.fromIndex(((NBTTagCompound) nbt).getInt("Operation"))
+            ));
+        });
+        return list;
+    }
+
     private Object toNBTBase(io.izzel.taboolib.module.nms.nbt.NBTBase base) {
         switch (base.getType().getId()) {
             case 1:
diff --git a/src/main/scala/io/izzel/taboolib/module/nms/nbt/NBTAttribute.java b/src/main/scala/io/izzel/taboolib/module/nms/nbt/NBTAttribute.java
new file mode 100644
index 0000000..09d7ee3
--- /dev/null
+++ b/src/main/scala/io/izzel/taboolib/module/nms/nbt/NBTAttribute.java
@@ -0,0 +1,168 @@
+package io.izzel.taboolib.module.nms.nbt;
+
+import io.izzel.taboolib.module.lite.SimpleEquip;
+import io.izzel.taboolib.util.item.Items;
+
+import java.util.Objects;
+import java.util.UUID;
+
+/**
+ * @Author sky
+ * @Since 2019-10-22 11:38
+ */
+public class NBTAttribute {
+
+    private UUID id;
+    private String name;
+    private String description;
+    private double amount;
+    private SimpleEquip slot;
+    private NBTOperation operation;
+
+    public NBTAttribute(String name, String description, double amount, NBTOperation operation) {
+        this(UUID.randomUUID(), name, description, amount, null, operation);
+    }
+
+    public NBTAttribute(String name, String description, double amount, SimpleEquip slot, NBTOperation operation) {
+        this(UUID.randomUUID(), name, description, amount, slot, operation);
+    }
+
+    public NBTAttribute(UUID id, String name, String description, double amount, NBTOperation operation) {
+        this(id, name, description, amount, null, operation);
+    }
+
+    public NBTAttribute(UUID id, String name, String description, double amount, SimpleEquip slot, NBTOperation operation) {
+        this.id = id;
+        this.name = name;
+        this.description = description;
+        this.amount = amount;
+        this.slot = slot;
+        this.operation = operation;
+    }
+
+    public NBTCompound toNBT() {
+        NBTCompound nbt = new NBTCompound();
+        nbt.put("UUIDMost", new NBTBase(id.getMostSignificantBits()));
+        nbt.put("UUIDLeast", new NBTBase(id.getLeastSignificantBits()));
+        nbt.put("AttributeName", new NBTBase(name));
+        nbt.put("Name", new NBTBase(description));
+        nbt.put("Amount", new NBTBase(amount));
+        nbt.put("Operation", new NBTBase(operation.ordinal()));
+        if (slot != null) {
+            nbt.put("Slot", new NBTBase(slot.getNMS()));
+        }
+        return nbt;
+    }
+
+    public static NBTAttribute fromNBT(NBTCompound nbt) {
+        NBTAttribute attribute = new NBTAttribute(
+                new UUID(nbt.get("UUIDMost").asLong(), nbt.get("UUIDLeast").asLong()),
+                nbt.get("AttributeName").asString(),
+                nbt.get("Name").asString(),
+                nbt.get("Amount").asDouble(),
+                NBTOperation.fromIndex(nbt.get("Operation").asInt())
+        );
+        if (nbt.containsKey("Slot")) {
+            attribute.slot(SimpleEquip.fromNMS(nbt.get("Slot").asString()));
+        }
+        return attribute;
+    }
+
+    public static NBTAttribute create() {
+        return new NBTAttribute(Items.asAttribute("damage"), "TabooLib Modifiers", 0, NBTOperation.ADD_NUMBER);
+    }
+
+    // *********************************
+    //
+    //        Getter and Setter
+    //
+    // *********************************
+
+    public UUID getId() {
+        return id;
+    }
+
+    public NBTAttribute id(UUID id) {
+        this.id = id;
+        return this;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public NBTAttribute name(String name) {
+        this.name = name;
+        return this;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public NBTAttribute description(String description) {
+        this.description = description;
+        return this;
+    }
+
+    public double getAmount() {
+        return amount;
+    }
+
+    public NBTAttribute amount(double amount) {
+        this.amount = amount;
+        return this;
+    }
+
+    public SimpleEquip getSlot() {
+        return slot;
+    }
+
+    public NBTAttribute slot(SimpleEquip slot) {
+        this.slot = slot;
+        return this;
+    }
+
+    public NBTOperation getOperation() {
+        return operation;
+    }
+
+    public NBTAttribute operation(NBTOperation operation) {
+        this.operation = operation;
+        return this;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (!(o instanceof NBTAttribute)) {
+            return false;
+        }
+        NBTAttribute that = (NBTAttribute) o;
+        return Double.compare(that.getAmount(), getAmount()) == 0 &&
+                Objects.equals(getId(), that.getId()) &&
+                Objects.equals(getName(), that.getName()) &&
+                Objects.equals(getDescription(), that.getDescription()) &&
+                getSlot() == that.getSlot() &&
+                getOperation() == that.getOperation();
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(getId(), getName(), getDescription(), getAmount(), getSlot(), getOperation());
+    }
+
+    @Override
+    public String toString() {
+        return "NBTAttribute{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                ", description='" + description + '\'' +
+                ", amount=" + amount +
+                ", slot=" + slot +
+                ", operation=" + operation +
+                '}';
+    }
+}
diff --git a/src/main/scala/io/izzel/taboolib/module/nms/nbt/NBTBase.java b/src/main/scala/io/izzel/taboolib/module/nms/nbt/NBTBase.java
index d76f69b..7e3de18 100644
--- a/src/main/scala/io/izzel/taboolib/module/nms/nbt/NBTBase.java
+++ b/src/main/scala/io/izzel/taboolib/module/nms/nbt/NBTBase.java
@@ -1,7 +1,13 @@
 package io.izzel.taboolib.module.nms.nbt;
 
+import io.izzel.taboolib.TabooLib;
+import org.bukkit.configuration.ConfigurationSection;
+
 import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
 import java.util.Objects;
+import java.util.regex.Pattern;
 
 /**
  * @Author 坏黑
@@ -9,6 +15,7 @@ import java.util.Objects;
  */
 public class NBTBase {
 
+    protected static final Pattern SHORT_PATTERN = Pattern.compile("\\d+s");
     protected NBTType type;
     protected Object data;
 
@@ -115,6 +122,65 @@ public class NBTBase {
         return type;
     }
 
+    public static NBTBase formNBTBase(Object obj) {
+        if (obj instanceof String) {
+            if (SHORT_PATTERN.matcher(obj.toString()).matches()) {
+                return formNBTBase(Short.valueOf(obj.toString().substring(0, obj.toString().length() - 1)));
+            }
+            return new NBTBase((String) obj);
+        } else if (obj instanceof Integer) {
+            return new NBTBase((int) obj);
+        } else if (obj instanceof Double) {
+            return new NBTBase((double) obj);
+        } else if (obj instanceof Float) {
+            return new NBTBase((float) obj);
+        } else if (obj instanceof Short) {
+            return new NBTBase((short) obj);
+        } else if (obj instanceof Long) {
+            return new NBTBase((long) obj);
+        } else if (obj instanceof Byte) {
+            return new NBTBase((byte) obj);
+        } else if (obj instanceof List) {
+            return translateList(new NBTList(), (List) obj);
+        } else if (obj instanceof Map) {
+            NBTCompound nbtCompound = new NBTCompound();
+            ((Map) obj).forEach((key, value) -> nbtCompound.put(key.toString(), formNBTBase(value)));
+            return nbtCompound;
+        } else if (obj instanceof ConfigurationSection) {
+            NBTCompound nbtCompound = new NBTCompound();
+            ((ConfigurationSection) obj).getValues(false).forEach((key, value) -> nbtCompound.put(key, formNBTBase(value)));
+            return nbtCompound;
+        }
+        return new NBTBase("error: " + obj);
+    }
+
+    public static NBTList translateList(NBTList nbtListBase, List list) {
+        for (Object obj : list) {
+            NBTBase base = formNBTBase(obj);
+            if (base == null) {
+                TabooLib.getLogger().warn("Invalid Type: " + obj + " [" + obj.getClass().getSimpleName() + "]");
+                continue;
+            }
+            nbtListBase.add(base);
+        }
+        return nbtListBase;
+    }
+
+    public static NBTCompound translateSection(NBTCompound nbt, ConfigurationSection section) {
+        for (String key : section.getKeys(false)) {
+            Object obj = section.get(key);
+            NBTBase base;
+            if (obj instanceof ConfigurationSection) {
+                base = translateSection(new NBTCompound(), section.getConfigurationSection(key));
+            } else if ((base = formNBTBase(obj)) == null) {
+                TabooLib.getLogger().warn("Invalid Type: " + obj + " [" + obj.getClass().getSimpleName() + "]");
+                continue;
+            }
+            nbt.put(key, base);
+        }
+        return nbt;
+    }
+
     @Override
     public boolean equals(Object o) {
         if (this == o) {
diff --git a/src/main/scala/io/izzel/taboolib/module/nms/nbt/NBTCompound.java b/src/main/scala/io/izzel/taboolib/module/nms/nbt/NBTCompound.java
index f475678..b94d4cb 100644
--- a/src/main/scala/io/izzel/taboolib/module/nms/nbt/NBTCompound.java
+++ b/src/main/scala/io/izzel/taboolib/module/nms/nbt/NBTCompound.java
@@ -49,11 +49,37 @@ public class NBTCompound extends NBTBase implements Map<String, NBTBase> {
         return value.get(key);
     }
 
+    public NBTBase getDeep(String key) {
+        NBTBase value = this;
+        for (String keyStr : key.split("\\.")) {
+            if ((value = value.asCompound().get(keyStr)) == null) {
+                return null;
+            }
+        }
+        return value;
+    }
+
     @Override
     public NBTBase put(String key, NBTBase value) {
         return this.value.put(key, value);
     }
 
+    public NBTBase putDeep(String key, NBTBase value) {
+        NBTBase compound = this, temp;
+        String[] keySplit = key.split("\\.");
+        for (String keyStr : keySplit) {
+            if (keyStr.equalsIgnoreCase(keySplit[keySplit.length - 1])) {
+                return ((NBTCompound) compound).put(keyStr, value);
+            }
+            if ((temp = compound.asCompound().get(keyStr)) == null) {
+                temp = new NBTCompound();
+                compound.asCompound().put(keyStr, temp);
+            }
+            compound = temp;
+        }
+        return null;
+    }
+
     @Override
     public NBTBase remove(Object key) {
         return value.remove(key);
diff --git a/src/main/scala/io/izzel/taboolib/module/nms/nbt/NBTOperation.java b/src/main/scala/io/izzel/taboolib/module/nms/nbt/NBTOperation.java
new file mode 100644
index 0000000..2c61dfd
--- /dev/null
+++ b/src/main/scala/io/izzel/taboolib/module/nms/nbt/NBTOperation.java
@@ -0,0 +1,27 @@
+package io.izzel.taboolib.module.nms.nbt;
+
+import io.izzel.taboolib.util.KV;
+import org.bukkit.util.NumberConversions;
+
+import java.util.Arrays;
+
+/**
+ * @Author sky
+ * @Since 2019-10-22 12:06
+ */
+public enum NBTOperation {
+
+    ADD_NUMBER, ADD_SCALAR, MULTIPLY_SCALAR_1;
+
+    public static NBTOperation fromIndex(int index) {
+        return Arrays.stream(values()).filter(operation -> operation.ordinal() == index).findFirst().orElse(ADD_NUMBER);
+    }
+
+    public static KV<Double, NBTOperation> fromSimple(String in) {
+        if (in.endsWith("%")) {
+            return new KV(NumberConversions.toDouble(in.substring(0, in.length() - 1)), ADD_SCALAR);
+        } else {
+            return new KV(NumberConversions.toDouble(in), ADD_NUMBER);
+        }
+    }
+}
diff --git a/src/main/scala/io/izzel/taboolib/util/Strings.java b/src/main/scala/io/izzel/taboolib/util/Strings.java
index 8530124..29c5a9f 100644
--- a/src/main/scala/io/izzel/taboolib/util/Strings.java
+++ b/src/main/scala/io/izzel/taboolib/util/Strings.java
@@ -7,10 +7,18 @@ import java.security.NoSuchAlgorithmException;
 
 public class Strings {
 
+    public static boolean nonBlack(String var) {
+        return !isBlank(var);
+    }
+
     public static boolean isBlank(String var) {
         return var == null || var.trim().isEmpty();
     }
 
+    public static boolean nonEmpty(CharSequence var) {
+        return !isEmpty(var);
+    }
+
     public static boolean isEmpty(CharSequence var) {
         return var == null || var.length() == 0;
     }
@@ -90,13 +98,13 @@ public class Strings {
     }
 
     private static String removeSign(String str) {
-        StringBuffer sb = new StringBuffer();
+        StringBuilder builder = new StringBuilder();
         for (char item : str.toCharArray()) {
             if (charReg(item)){
-                sb.append(item);
+                builder.append(item);
             }
         }
-        return sb.toString();
+        return builder.toString();
     }
 
     private static boolean charReg(char charValue) {
diff --git a/src/main/scala/io/izzel/taboolib/util/item/Items.java b/src/main/scala/io/izzel/taboolib/util/item/Items.java
index 491016d..58c88f3 100644
--- a/src/main/scala/io/izzel/taboolib/util/item/Items.java
+++ b/src/main/scala/io/izzel/taboolib/util/item/Items.java
@@ -2,13 +2,13 @@ package io.izzel.taboolib.util.item;
 
 import com.google.common.collect.ImmutableMap;
 import io.izzel.taboolib.Version;
+import io.izzel.taboolib.module.lite.SimpleEquip;
 import io.izzel.taboolib.module.lite.SimpleI18n;
 import io.izzel.taboolib.module.locale.TLocale;
 import io.izzel.taboolib.module.nms.NMS;
 import io.izzel.taboolib.module.nms.nbt.NBTBase;
 import io.izzel.taboolib.module.nms.nbt.NBTCompound;
 import io.izzel.taboolib.module.nms.nbt.NBTList;
-import io.izzel.taboolib.util.lite.Numbers;
 import org.bukkit.Color;
 import org.bukkit.Material;
 import org.bukkit.configuration.ConfigurationSection;
@@ -26,6 +26,8 @@ import org.bukkit.util.NumberConversions;
 
 import java.util.List;
 import java.util.Map;
+import java.util.Optional;
+import java.util.UUID;
 
 /**
  * @Author 坏黑
@@ -48,6 +50,10 @@ public class Items {
         return item == null || item.getType().equals(Material.AIR);
     }
 
+    public static boolean nonNull(ItemStack item) {
+        return !isNull(item);
+    }
+
     public static boolean hasLore(ItemStack i, String a) {
         return hasLore(i) && i.getItemMeta().getLore().toString().contains(a);
     }
@@ -210,11 +216,11 @@ public class Items {
             return section.getItemStack("bukkit");
         }
         // 材质
-        ItemStack item = new ItemStack(asMaterial(section.getString("material")));
+        ItemStack item = new ItemStack(asMaterial(section.contains("material") ? section.getString("material") : section.getString("type")));
         // 数量
-        item.setAmount(section.contains("amount") ? section.getInt("amount") : 1);
+        item.setAmount(section.contains("amount") ? section.getInt("amount") : section.getInt("count", 1));
         // 耐久
-        item.setDurability((short) section.getInt("data"));
+        item.setDurability((short) (section.contains("data") ? section.getInt("data") : section.getInt("damage")));
         // 元数据
         ItemMeta meta = item.getItemMeta();
         // 展示名
@@ -272,18 +278,7 @@ public class Items {
         NBTCompound nbt = NMS.handle().loadNBT(item);
         // 物品标签
         if (section.contains("nbt")) {
-            for (String name : section.getConfigurationSection("nbt").getKeys(false)) {
-                Object obj = section.get("nbt." + name);
-                if (obj instanceof String) {
-                    nbt.put(name, new NBTBase(obj.toString()));
-                } else if (obj instanceof Double) {
-                    nbt.put(name, new NBTBase(NumberConversions.toDouble(obj)));
-                } else if (obj instanceof Integer) {
-                    nbt.put(name, new NBTBase(NumberConversions.toInt(obj)));
-                } else if (obj instanceof Long) {
-                    nbt.put(name, new NBTBase(NumberConversions.toLong(obj)));
-                }
-            }
+            NBTBase.translateSection(nbt, section.getConfigurationSection("nbt"));
         }
         // 物品属性
         if (section.contains("attributes")) {
@@ -292,6 +287,7 @@ public class Items {
                 for (String name : section.getConfigurationSection("attributes." + hand).getKeys(false)) {
                     if (asAttribute(name) != null) {
                         try {
+                            UUID uuid = UUID.randomUUID();
                             NBTCompound a = new NBTCompound();
                             String num = section.getString("attributes." + hand + "." + name);
                             if (num.endsWith("%")) {
@@ -302,11 +298,11 @@ public class Items {
                                 a.put("Operation", new NBTBase(0));
                             }
                             a.put("AttributeName", new NBTBase(asAttribute(name)));
-                            a.put("UUIDMost", new NBTBase(Numbers.getRandom().nextInt(Integer.MAX_VALUE)));
-                            a.put("UUIDLeast", new NBTBase(Numbers.getRandom().nextInt(Integer.MAX_VALUE)));
+                            a.put("UUIDMost", new NBTBase(uuid.getMostSignificantBits()));
+                            a.put("UUIDLeast", new NBTBase(uuid.getLeastSignificantBits()));
                             a.put("Name", new NBTBase(asAttribute(name)));
                             if (!hand.equals("all")) {
-                                a.put("Slot", new NBTBase(hand));
+                                Optional.ofNullable(SimpleEquip.fromNMS(hand)).ifPresent(e -> a.put("Slot", new NBTBase(e.getNMS())));
                             }
                             attr.add(a);
                         } catch (Exception ignored) {
diff --git a/src/main/scala/io/izzel/taboolib/util/item/inventory/ClickListener.java b/src/main/scala/io/izzel/taboolib/util/item/inventory/ClickListener.java
index 3aab994..65b1aab 100644
--- a/src/main/scala/io/izzel/taboolib/util/item/inventory/ClickListener.java
+++ b/src/main/scala/io/izzel/taboolib/util/item/inventory/ClickListener.java
@@ -1,8 +1,13 @@
 package io.izzel.taboolib.util.item.inventory;
 
+import io.izzel.taboolib.TabooLib;
 import io.izzel.taboolib.module.inject.TListener;
+import io.izzel.taboolib.util.item.Items;
+import io.izzel.taboolib.util.lite.Vectors;
 import org.bukkit.Bukkit;
 import org.bukkit.entity.HumanEntity;
+import org.bukkit.entity.Item;
+import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
 import org.bukkit.event.inventory.InventoryClickEvent;
@@ -11,6 +16,7 @@ import org.bukkit.event.inventory.InventoryDragEvent;
 import org.bukkit.event.player.PlayerDropItemEvent;
 import org.bukkit.event.player.PlayerItemHeldEvent;
 import org.bukkit.event.server.PluginDisableEvent;
+import org.bukkit.metadata.FixedMetadataValue;
 
 import java.util.Optional;
 
@@ -22,43 +28,68 @@ import java.util.Optional;
 class ClickListener implements Listener {
 
     @EventHandler
-    public void onDisable(PluginDisableEvent e) {
+    public void e(PluginDisableEvent e) {
         Bukkit.getOnlinePlayers().stream().filter(player -> player.getOpenInventory().getTopInventory().getHolder() instanceof MenuHolder && e.getPlugin().equals(((MenuHolder) player.getOpenInventory().getTopInventory().getHolder()).getBuilder().getPlugin())).forEach(HumanEntity::closeInventory);
     }
 
     @EventHandler
-    public void onClick(InventoryClickEvent e) {
+    public void e(InventoryClickEvent e) {
         if (e.getInventory().getHolder() instanceof MenuHolder) {
+            // lock hand
             if (((MenuHolder) e.getInventory().getHolder()).getBuilder().isLockHand() && (e.getRawSlot() - e.getInventory().getSize() - 27 == e.getWhoClicked().getInventory().getHeldItemSlot() || (e.getClick() == org.bukkit.event.inventory.ClickType.NUMBER_KEY && e.getHotbarButton() == e.getWhoClicked().getInventory().getHeldItemSlot()))) {
                 e.setCancelled(true);
             }
             Optional.ofNullable(((MenuHolder) e.getInventory().getHolder()).getBuilder().getClickTask()).ifPresent(t -> t.run(new ClickEvent(ClickType.CLICK, e, ((MenuHolder) e.getInventory().getHolder()).getBuilder().getSlot(e.getRawSlot()))));
+            // drop on empty area
+            if (!e.isCancelled() && Items.nonNull(e.getCurrentItem()) && e.getClick() == org.bukkit.event.inventory.ClickType.DROP) {
+                Item item = Vectors.itemDrop((Player) e.getWhoClicked(), e.getCurrentItem());
+                item.setPickupDelay(20);
+                item.setMetadata("internal-drop", new FixedMetadataValue(TabooLib.getPlugin(), true));
+                PlayerDropItemEvent event = new PlayerDropItemEvent((Player) e.getWhoClicked(), item);
+                if (event.isCancelled()) {
+                    event.getItemDrop().remove();
+                } else {
+                    e.setCurrentItem(null);
+                }
+            }
+            // drop by keyboard
+            else if (!e.isCancelled() && Items.nonNull(e.getCursor()) && e.getRawSlot() == -999) {
+                Item item = Vectors.itemDrop((Player) e.getWhoClicked(), e.getCursor());
+                item.setPickupDelay(20);
+                item.setMetadata("internal-drop", new FixedMetadataValue(TabooLib.getPlugin(), true));
+                PlayerDropItemEvent event = new PlayerDropItemEvent((Player) e.getWhoClicked(), item);
+                if (event.isCancelled()) {
+                    event.getItemDrop().remove();
+                } else {
+                    e.getView().setCursor(null);
+                }
+            }
         }
     }
 
     @EventHandler
-    public void onDrag(InventoryDragEvent e) {
+    public void e(InventoryDragEvent e) {
         if (e.getInventory().getHolder() instanceof MenuHolder) {
             Optional.ofNullable(((MenuHolder) e.getInventory().getHolder()).getBuilder().getClickTask()).ifPresent(t -> t.run(new ClickEvent(ClickType.DRAG, e, ' ')));
         }
     }
 
     @EventHandler
-    public void onDrag(InventoryCloseEvent e) {
+    public void e(InventoryCloseEvent e) {
         if (e.getInventory().getHolder() instanceof MenuHolder) {
             Optional.ofNullable(((MenuHolder) e.getInventory().getHolder()).getBuilder().getCloseTask()).ifPresent(t -> t.run(e));
         }
     }
 
     @EventHandler
-    public void onDrop(PlayerDropItemEvent e) {
-        if (e.getPlayer().getOpenInventory().getTopInventory().getHolder() instanceof MenuHolder && ((MenuHolder) e.getPlayer().getOpenInventory().getTopInventory().getHolder()).getBuilder().isLockHand()) {
+    public void e(PlayerDropItemEvent e) {
+        if (e.getPlayer().getOpenInventory().getTopInventory().getHolder() instanceof MenuHolder && ((MenuHolder) e.getPlayer().getOpenInventory().getTopInventory().getHolder()).getBuilder().isLockHand() && !e.getItemDrop().hasMetadata("internal-drop")) {
             e.setCancelled(true);
         }
     }
 
     @EventHandler
-    public void onHeld(PlayerItemHeldEvent e) {
+    public void e(PlayerItemHeldEvent e) {
         if (e.getPlayer().getOpenInventory().getTopInventory().getHolder() instanceof MenuHolder && ((MenuHolder) e.getPlayer().getOpenInventory().getTopInventory().getHolder()).getBuilder().isLockHand()) {
             e.setCancelled(true);
         }
diff --git a/src/main/scala/io/izzel/taboolib/util/lite/Vectors.java b/src/main/scala/io/izzel/taboolib/util/lite/Vectors.java
index c1e0b67..56abc16 100644
--- a/src/main/scala/io/izzel/taboolib/util/lite/Vectors.java
+++ b/src/main/scala/io/izzel/taboolib/util/lite/Vectors.java
@@ -15,6 +15,10 @@ import java.util.stream.IntStream;
  */
 public class Vectors {
 
+    public static Item itemDrop(Player player, ItemStack itemStack) {
+        return itemDrop(player, itemStack, 0.0, 0.4);
+    }
+
     public static Item itemDrop(Player player, ItemStack itemStack, double bulletSpread, double radius) {
         Location location = player.getLocation().add(0.0D, 1.5D, 0.0D);
         Item item = player.getWorld().dropItem(location, itemStack);