diff --git a/SpigotCore_Main/src/de/steamwar/command/Argument.java b/SpigotCore_Main/src/de/steamwar/command/Argument.java
index 64cdb76..4f80c92 100644
--- a/SpigotCore_Main/src/de/steamwar/command/Argument.java
+++ b/SpigotCore_Main/src/de/steamwar/command/Argument.java
@@ -21,7 +21,7 @@
 
 package de.steamwar.command;
 
-import com.sk89q.worldedit.extent.world.SurvivalModeExtent;
+import com.mojang.datafixers.types.Func;
 import org.bukkit.Bukkit;
 import org.bukkit.GameMode;
 import org.bukkit.Material;
@@ -69,7 +69,7 @@ public class Argument<T> {
 
     private ArgumentType<T> argumentType;
     private Predicate<T> constraint;
-    private Supplier<String[]> tabCompletes;
+    private Function<String, String[]> tabCompletes;
     private Function<T, ?> valueMapper;
 
     public Argument(ArgumentType<T> argumentType, Predicate<T> constraint, String... tabCompletes) {
@@ -80,7 +80,15 @@ public class Argument<T> {
         this(argumentType, constraint, o -> o, tabCompletes);
     }
 
+    public Argument(ArgumentType<T> argumentType, Predicate<T> constraint, Function<String, String[]> tabCompletes) {
+        this(argumentType, constraint, o -> o, tabCompletes);
+    }
+
     public <M> Argument(ArgumentType<T> argumentType, Predicate<T> constraint, Function<T, M> valueMapper, Supplier<String[]> tabCompletes) {
+        this(argumentType, constraint, valueMapper, s -> tabCompletes.get());
+    }
+
+    public <M> Argument(ArgumentType<T> argumentType, Predicate<T> constraint, Function<T, M> valueMapper, Function<String, String[]> tabCompletes) {
         this.argumentType = argumentType;
         this.constraint = constraint;
         this.valueMapper = valueMapper;
@@ -109,7 +117,7 @@ public class Argument<T> {
                 // Check number constraints if needed
                 if (argumentType.number && !constraint.test(argumentMapped)) return Optional.empty();
             }
-            List<String> strings = Arrays.stream(tabCompletes.get()).filter(t -> t.startsWith(s)).collect(Collectors.toList());
+            List<String> strings = Arrays.stream(tabCompletes.apply(s)).filter(t -> t.startsWith(s)).collect(Collectors.toList());
             if (strings.isEmpty()) strings.add(s);
             return Optional.of(strings);
         } catch (NumberFormatException e) {
@@ -189,7 +197,7 @@ public class Argument<T> {
     @Override
     public String toString() {
         return "Argument{" +
-                "tabCompletes=" + Arrays.toString(tabCompletes.get()) +
+                "tabCompletes=" + Arrays.toString(tabCompletes.apply("")) +
                 '}';
     }
 
diff --git a/SpigotCore_Main/src/de/steamwar/command/ArgumentUtils.java b/SpigotCore_Main/src/de/steamwar/command/ArgumentUtils.java
index 724de1e..6487576 100644
--- a/SpigotCore_Main/src/de/steamwar/command/ArgumentUtils.java
+++ b/SpigotCore_Main/src/de/steamwar/command/ArgumentUtils.java
@@ -21,6 +21,7 @@
 
 package de.steamwar.command;
 
+import javax.xml.crypto.dsig.spec.XSLTTransformParameterSpec;
 import java.util.Arrays;
 import java.util.function.Predicate;
 
@@ -43,6 +44,20 @@ public class ArgumentUtils {
         }, arguments);
     }
 
+    public static Argument<String> of(String[] commands, String[] tabCompletes) {
+        return new Argument<>(ArgumentType.STRING, string -> {
+            for (String arg : commands){
+                if (string.equals(arg)) return true;
+            }
+            return false;
+        }, s -> {
+            if (s.isEmpty()) {
+                return tabCompletes;
+            }
+            return commands;
+        });
+    }
+
     public static Argument<String> ofIgnoreCase(String argument) {
         return new Argument<>(ArgumentType.STRING, string -> string.equalsIgnoreCase(argument), argument);
     }
@@ -56,6 +71,20 @@ public class ArgumentUtils {
         }, arguments);
     }
 
+    public static Argument<String> ofIgnoreCase(String[] commands, String[] tabCompletes) {
+        return new Argument<>(ArgumentType.STRING, string -> {
+            for (String arg : commands){
+                if (string.equalsIgnoreCase(arg)) return true;
+            }
+            return false;
+        }, s -> {
+            if (s.isEmpty()) {
+                return tabCompletes;
+            }
+            return commands;
+        });
+    }
+
     public static Argument<Integer> above(int minValue, int... tabValues) {
         return between(minValue, Integer.MAX_VALUE, tabValues);
     }