diff --git a/CommonCore b/CommonCore
index 9df9259..1dea719 160000
--- a/CommonCore
+++ b/CommonCore
@@ -1 +1 @@
-Subproject commit 9df92595b2f344585bd3e1639cedc761680b7761
+Subproject commit 1dea71993d897354d3f52a705f6e0e1e0c8ec580
diff --git a/src/de/steamwar/bungeecore/commands/BauCommand.java b/src/de/steamwar/bungeecore/commands/BauCommand.java
index 9691ebc..09c5877 100644
--- a/src/de/steamwar/bungeecore/commands/BauCommand.java
+++ b/src/de/steamwar/bungeecore/commands/BauCommand.java
@@ -25,6 +25,9 @@ import de.steamwar.bungeecore.inventory.SWItem;
 import de.steamwar.bungeecore.network.NetworkSender;
 import de.steamwar.bungeecore.sql.*;
 import de.steamwar.bungeecore.util.Chat19;
+import de.steamwar.command.SWCommand;
+import de.steamwar.command.TypeMapper;
+import de.steamwar.command.TypeValidator;
 import de.steamwar.messages.ChatSender;
 import de.steamwar.network.packets.server.BaumemberUpdatePacket;
 import net.md_5.bungee.api.CommandSender;
@@ -32,89 +35,91 @@ import net.md_5.bungee.api.ProxyServer;
 import net.md_5.bungee.api.config.ServerInfo;
 import net.md_5.bungee.api.connection.ProxiedPlayer;
 
-public class BauCommand extends BasicCommand {
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+
+public class BauCommand extends SWCommand {
 
     public BauCommand(){
         super("bau", null, "b", "build", "gs");
     }
 
-    @Override
-    public void execute(CommandSender sender, String[] args) {
-        if(!(sender instanceof ProxiedPlayer)) {
-            return;
-        }
+    @Register(help = true)
+    public void genericHelp(ProxiedPlayer p, String... args) {
+        HelpCommand.sendBauHelp(ChatSender.of(p));
+    }
 
-        ProxiedPlayer p = (ProxiedPlayer) sender;
-
-        versionSelector(p, args, 0,
-                () -> new ServerStarter().build19(p.getUniqueId()).send(p).start(),
-                () -> new ServerStarter().build15(p.getUniqueId()).send(p).start(),
+    @Register
+    public void toBau(ProxiedPlayer p, @Mapper("version") @OptionalValue("") int version) {
+        versionSelector(version,
                 () -> new ServerStarter().build12(p.getUniqueId()).send(p).start(),
-                () -> {
-                    switch (args[0].toLowerCase()) {
-                        case "addmember":
-                            addmember(p, args);
-                            break;
-                        case "tp":
-                        case "teleport":
-                            teleport(p, args);
-                            break;
-                        case "info":
-                            Chat19.chat(p, "/bauinfo");
-                            break;
-                        case "togglewe":
-                            togglewe(p, args);
-                            break;
-                        case "toggleworld":
-                            toggleworld(p, args);
-                            break;
-                        case "delmember":
-                            delmember(p, args);
-                            break;
-                        case "resetall":
-                        case "delete":
-                            delete(p, args);
-                            break;
-                        case "testarena":
-                        case "test":
-                            testarena(p, args);
-                            break;
-                        case "lock":
-                            if(args.length < 2) {
-                                Message.send("BAU_LOCKED_OPTIONS", p);
-                                return;
-                            }
-
-                            BauLock.setLocked(p, args[1].toUpperCase());
-                            break;
-                        case "unlock":
-                            BauLock.setLocked(p, "OPEN");
-                            break;
-                        default:
-                            HelpCommand.sendBauHelp(ChatSender.of(p));
-                    }
-                }
+                () -> new ServerStarter().build15(p.getUniqueId()).send(p).start(),
+                () -> new ServerStarter().build19(p.getUniqueId()).send(p).start()
         );
     }
 
-    private static void addmember(ProxiedPlayer p, String[] args){
-        if (args.length == 1) {
-            Message.send("BAU_ADDMEMBER_USAGE", p);
-            return;
+    public void versionSelector(int version, Runnable r12, Runnable r15, Runnable r19) {
+        switch (version) {
+            case 12:
+                r12.run();
+                break;
+            case 15:
+                r15.run();
+                break;
+            case 19:
+                r19.run();
+                break;
         }
+    }
 
-        SteamwarUser target = SteamwarUser.get(args[1]);
-        if (target == null) {
-            Message.send("UNKNOWN_PLAYER", p);
-            return;
-        }else if(target.getUuid().equals(p.getUniqueId())) {
-            Message.send("BAU_ADDMEMBER_SELFADD", p);
-            return;
-        }else if (BauweltMember.getBauMember(p.getUniqueId(), target.getUuid()) != null) {
-            Message.send("BAU_ADDMEMBER_ISADDED", p);
-            return;
-        }
+    @Mapper(value = "version", local = true)
+    public TypeMapper<Integer> versionMapper() {
+        Map<String, Integer> versionMap = new HashMap<>();
+        versionMap.put("19", 19);
+        versionMap.put("1.19", 19);
+        versionMap.put("mwg", 19);
+        versionMap.put("miniwargear", 19);
+        versionMap.put("wg", 19);
+        versionMap.put("wargear", 19);
+        versionMap.put("ws", 15);
 
+        versionMap.put("15", 15);
+        versionMap.put("1.15", 15);
+        versionMap.put("warship", 15);
+        versionMap.put("as", 15);
+        versionMap.put("airship", 15);
+
+        versionMap.put("12", 12);
+        versionMap.put("1.12", 12);
+
+        return new TypeMapper<Integer>() {
+            @Override
+            public Integer map(CommandSender commandSender, String[] previousArguments, String s) {
+                if (commandSender == null) return null;
+                ProxiedPlayer player = (ProxiedPlayer) commandSender;
+                if (s.isEmpty()) {
+                    int version = player.getPendingConnection().getVersion();
+                    if (version > 578) { // Version > 1.15.2
+                        return 19;
+                    } else if (version > 340) { // Version > 1.12.2
+                        return 15;
+                    } else {
+                        return 12;
+                    }
+                }
+                return versionMap.get(s.toLowerCase());
+            }
+
+            @Override
+            public Collection<String> tabCompletes(CommandSender sender, String[] previousArguments, String s) {
+                return versionMap.keySet();
+            }
+        };
+    }
+
+    @Register(value = "addmember", description = "BAU_ADDMEMBER_USAGE")
+    public void addmember(ProxiedPlayer p, @Validator("addMemberTarget") SteamwarUser target) {
         new BauweltMember(p.getUniqueId(), target.getUuid(), false, false);
         Message.send("BAU_ADDMEMBER_ADDED", p);
 
@@ -123,76 +128,69 @@ public class BauCommand extends BasicCommand {
             Message.send("BAU_ADDMEMBER_ADDED_TARGET", z, p.getName());
     }
 
-    private static void teleport(ProxiedPlayer p, String[] args){
-        if (args.length == 1) {
-            Message.send("BAU_TP_USAGE", p);
-            return;
-        }
-
-        SteamwarUser worldOwner = SteamwarUser.get(args[1]);
-        if (worldOwner == null) {
-            Message.send("UNKNOWN_PLAYER", p);
-            return;
-        }else if (!p.getUniqueId().equals(worldOwner.getUuid()) && BauweltMember.getBauMember(worldOwner.getUuid(), p.getUniqueId()) == null){
-            SubserverSystem.sendDeniedMessage(p, worldOwner.getUuid());
-            Message.send("BAU_TP_NOALLOWED", p);
-            return;
-        }
-
-        if(BauLock.isLocked(worldOwner, SteamwarUser.get(p))) {
-            Message.send("BAU_LOCKED_NOALLOWED", p);
-            return;
-        }
-
-        versionSelector(p, args, 2,
-                () -> new ServerStarter().build19(worldOwner.getUuid()).send(p).start(),
-                () -> new ServerStarter().build15(worldOwner.getUuid()).send(p).start(),
-                () -> new ServerStarter().build12(worldOwner.getUuid()).send(p).start(),
-                () -> HelpCommand.sendBauHelp(ChatSender.of(p)));
-    }
-
-    private static void versionSelector(ProxiedPlayer p, String[] args, int pos, Runnable run19, Runnable run15, Runnable run12, Runnable runElse) {
-        if(args.length <= pos) {
-            int version = p.getPendingConnection().getVersion();
-            if(version > 578) { // Version > 1.15.2
-                run19.run();
-            } else if(version > 340) { // Version > 1.12.2
-                run15.run();
-            } else {
-                run12.run();
+    @Validator(value = "addMemberTarget", local = true)
+    public TypeValidator<SteamwarUser> addMemberTargetValidator() {
+        return (sender, value, messageSender) -> {
+            if (value == null) {
+                messageSender.send("UNKNOWN_PLAYER");
+                return false;
             }
-            return;
-        }
-
-        switch (args[pos].toLowerCase()) {
-            case "19":
-            case "1.19":
-            case "mwg":
-            case "miniwargear":
-                run19.run();
-                break;
-            case "ws":
-            case "warship":
-            case "as":
-            case "airship":
-            case "wg":
-            case "wargear":
-            case "15":
-            case "1.15":
-                run15.run();
-                break;
-            case "12":
-            case "1.12":
-                run12.run();
-                break;
-            default:
-                runElse.run();
-        }
+            if (((ProxiedPlayer) sender).getUniqueId().equals(value.getUuid())) {
+                messageSender.send("BAU_ADDMEMBER_SELFADD");
+                return false;
+            }
+            if (BauweltMember.getBauMember(((ProxiedPlayer) sender).getUniqueId(), value.getUuid()) != null) {
+                messageSender.send("BAU_ADDMEMBER_ISADDED");
+                return false;
+            }
+            return true;
+        };
     }
 
-    private static void togglewe(ProxiedPlayer p, String[] args){
-        BauweltMember target = toggle(p, args, "togglewe");
-        if(target == null)
+    @Register(value = "tp", description = "BAU_TP_USAGE")
+    @Register("teleport")
+    public void teleport(ProxiedPlayer p, @Validator("teleportTarget") SteamwarUser worldOwner, @Mapper("version") @OptionalValue("") int version) {
+        versionSelector(version,
+                () -> new ServerStarter().build12(worldOwner.getUuid()).send(p).start(),
+                () -> new ServerStarter().build15(worldOwner.getUuid()).send(p).start(),
+                () -> new ServerStarter().build19(worldOwner.getUuid()).send(p).start()
+        );
+    }
+
+    @Validator(value = "teleportTarget", local = true)
+    public TypeValidator<SteamwarUser> teleportTargetValidator() {
+        return (sender, value, messageSender) -> {
+            if (value == null) {
+                messageSender.send("UNKNOWN_PLAYER");
+                return false;
+            }
+            ProxiedPlayer p = (ProxiedPlayer) sender;
+            if (!p.getUniqueId().equals(value.getUuid()) && BauweltMember.getBauMember(value.getUuid(), p.getUniqueId()) == null) {
+                SubserverSystem.sendDeniedMessage(p, value.getUuid());
+                messageSender.send("BAU_TP_NOALLOWED");
+                return false;
+            }
+            if(BauLock.isLocked(value, SteamwarUser.get(p))) {
+                messageSender.send("BAU_LOCKED_NOALLOWED");
+                return false;
+            }
+            return true;
+        };
+    }
+
+    @Register("info")
+    public void info(ProxiedPlayer p) {
+        Chat19.chat(p, "/bauinfo");
+    }
+
+    @Register("togglewe")
+    public void togglewe(ProxiedPlayer p, @AllowNull @OptionalValue("") SteamwarUser user) {
+        if (user == null) {
+            Message.send("BAU_MEMBER_TOGGLE_USAGE", p, "togglewe");
+            return;
+        }
+        BauweltMember target = member(p, user);
+        if (target == null)
             return;
 
         target.setWorldEdit(!target.isWorldEdit());
@@ -200,9 +198,14 @@ public class BauCommand extends BasicCommand {
         isAllowedTo(target.isWorldEdit(), p, target, "BAU_MEMBER_TOGGLE_WORLD_EDIT");
     }
 
-    private static void toggleworld(ProxiedPlayer p, String[] args){
-        BauweltMember target = toggle(p, args, "toggleworld");
-        if(target == null)
+    @Register("toggleworld")
+    public void toggleworld(ProxiedPlayer p, @AllowNull @OptionalValue("") SteamwarUser user) {
+        if (user == null) {
+            Message.send("BAU_MEMBER_TOGGLE_USAGE", p, "toggleworld");
+            return;
+        }
+        BauweltMember target = member(p, user);
+        if (target == null)
             return;
 
         target.setWorld(!target.isWorld());
@@ -220,14 +223,10 @@ public class BauCommand extends BasicCommand {
         }
     }
 
-    private static void delmember(ProxiedPlayer p, String[] args){
-        if (args.length == 1) {
-            Message.send("BAU_DELMEMBER_USAGE", p);
-            return;
-        }
-
-        BauweltMember target = member(p, SteamwarUser.get(args[1]));
-        if(target == null)
+    @Register(value = "delmember", description = "BAU_DELMEMBER_USAGE")
+    public void delmember(ProxiedPlayer p, SteamwarUser user) {
+        BauweltMember target = member(p, user);
+        if (target == null)
             return;
 
         if(SteamwarUser.get(target.getMemberID()).getUuid().equals(p.getUniqueId())) {
@@ -247,13 +246,15 @@ public class BauCommand extends BasicCommand {
         Message.send("BAU_DELMEMBER_DELETED", p);
     }
 
-    private static void delete(ProxiedPlayer p, String[] args){
+    @Register("resetall")
+    @Register("delete")
+    public void delete(ProxiedPlayer p, @Mapper("version") @OptionalValue("") int version) {
         SteamwarUser user = SteamwarUser.get(p.getUniqueId());
-        versionSelector(p, args, 1,
-                () -> deleteConfirmation(p, () -> deleteWorld(p, ServerStarter.WORLDS19_PATH + user.getId())),
-                () -> deleteConfirmation(p, () -> deleteWorld(p, ServerStarter.WORLDS15_PATH + user.getId())),
+        versionSelector(version,
                 () -> deleteConfirmation(p, () -> deleteWorld(p, ServerStarter.WORLDS12_PATH + p.getUniqueId().toString())),
-                () -> HelpCommand.sendBauHelp(ChatSender.of(p)));
+                () -> deleteConfirmation(p, () -> deleteWorld(p, ServerStarter.WORLDS15_PATH + user.getId())),
+                () -> deleteConfirmation(p, () -> deleteWorld(p, ServerStarter.WORLDS19_PATH + user.getId()))
+        );
     }
 
     private static void deleteConfirmation(ProxiedPlayer p, Runnable worldDeletion) {
@@ -281,8 +282,22 @@ public class BauCommand extends BasicCommand {
         });
     }
 
-    private static void testarena(ProxiedPlayer p, String[] args){
-        FightCommand.createArena(p, "/bau testarena ", false, args, 1, false, (player, mode, map) -> ProxyServer.getInstance().getScheduler().runAsync(BungeeCore.get(), () -> new ServerStarter().test(mode, map, p).start()));
+    @Register("test")
+    @Register("testarena")
+    public void testarena(ProxiedPlayer p, @Mapper("nonHistoricArenaMode") @OptionalValue("") @AllowNull ArenaMode arenaMode, @Mapper("arenaMap") @OptionalValue("") @AllowNull String map) {
+        FightCommand.createArena(p, "/bau testarena ", false, arenaMode, map, false, (player, mode, m) -> {
+            ProxyServer.getInstance().getScheduler().runAsync(BungeeCore.get(), () -> new ServerStarter().test(mode, map, p).start());
+        });
+    }
+
+    @Register(value = "lock", description = "BAU_LOCKED_OPTIONS")
+    public void lock(ProxiedPlayer p, BauLockState bauLockState) {
+        BauLock.setLocked(p, bauLockState);
+    }
+
+    @Register("unlock")
+    public void unlock(ProxiedPlayer p) {
+        BauLock.setLocked(p, BauLockState.OPEN);
     }
 
     private static BauweltMember member(ProxiedPlayer p, SteamwarUser member){
@@ -299,16 +314,6 @@ public class BauCommand extends BasicCommand {
         return target;
     }
 
-    private static BauweltMember toggle(ProxiedPlayer p, String[] args, String subcommand){
-        if (args.length == 1) {
-            Message.send("BAU_MEMBER_TOGGLE_USAGE", p, subcommand);
-            return null;
-        }
-
-        SteamwarUser member = SteamwarUser.get(args[1]);
-        return member(p, member);
-    }
-
     private static void isAllowedTo(boolean permission, ProxiedPlayer p, BauweltMember target, String what){
         ProxiedPlayer player = ProxyServer.getInstance().getPlayer(SteamwarUser.get(target.getMemberID()).getUuid());
 
diff --git a/src/de/steamwar/bungeecore/commands/FightCommand.java b/src/de/steamwar/bungeecore/commands/FightCommand.java
index ad6b08a..5911db5 100644
--- a/src/de/steamwar/bungeecore/commands/FightCommand.java
+++ b/src/de/steamwar/bungeecore/commands/FightCommand.java
@@ -157,54 +157,6 @@ public class FightCommand extends SWCommand {
         }
     }
 
-    static void createArena(CommandSender s, String precommand, boolean allowMerging, String[] args, int startArg, boolean historic, FightCallback callback){
-        if(!(s instanceof ProxiedPlayer))
-            return;
-
-        ProxiedPlayer player = (ProxiedPlayer) s;
-
-        ChatSender sender = ChatSender.of(player);
-        if (sender.user().isPunishedWithMessage(sender, Punishment.PunishmentType.NoFightServer)) {
-            return;
-        }
-
-        if(alreadyInArena(player))
-            return;
-
-        if(ModLoaderBlocker.isFabric(player) && !precommand.equals("/bau testarena "))  {
-            sender.system("MODLOADER_DENIED");
-            return;
-        }
-
-        if(args.length < startArg+1){
-            getModes(sender, precommand, historic);
-            return;
-        }
-
-        ArenaMode mode = getMode(sender, args[startArg]);
-        if(mode == null)
-            return;
-
-        String map;
-        if(mode.getMaps().size() == 1){
-            map = mode.getRandomMap();
-        }else if(args.length < startArg+2){
-            getMaps(sender, precommand, mode);
-            return;
-        }else{
-            map = getMap(sender, mode, args[startArg+1]);
-        }
-
-        if(map == null)
-            return;
-
-        if(!allowMerging) {
-            callback.run(player, mode, map);
-        } else {
-            suggestMerging(player, mode, map, callback);
-        }
-    }
-
     public static void suggestMerging(ProxiedPlayer player, ArenaMode mode, String map, FightCallback declineMerge) {
         Arenaserver mergable = null;
         synchronized (Subserver.getServerList()) {
diff --git a/src/de/steamwar/bungeecore/sql/BauLock.java b/src/de/steamwar/bungeecore/sql/BauLock.java
index 8181610..f69a771 100644
--- a/src/de/steamwar/bungeecore/sql/BauLock.java
+++ b/src/de/steamwar/bungeecore/sql/BauLock.java
@@ -20,21 +20,15 @@
 package de.steamwar.bungeecore.sql;
 
 import de.steamwar.bungeecore.Message;
+import lombok.experimental.UtilityClass;
 import net.md_5.bungee.api.connection.ProxiedPlayer;
 
+@UtilityClass
 public class BauLock {
 
     private static final String BAU_LOCK_CONFIG_NAME = "baulockstate";
-    public static void setLocked(ProxiedPlayer p, String arg) {
+    public static void setLocked(ProxiedPlayer p, BauLockState state) {
         SteamwarUser owner = SteamwarUser.get(p.getUniqueId());
-        BauLockState state;
-        try {
-            state = BauLockState.valueOf(arg);
-        } catch (IllegalArgumentException e) {
-            Message.send("BAU_LOCKED_OPTIONS", owner.getPlayer());
-            return;
-        }
-
         UserConfig.updateUserConfig(owner.getId(), BAU_LOCK_CONFIG_NAME, state == BauLockState.OPEN ? null : state.name());
         Message.send("BAU_LOCKED_" + state.name(), owner.getPlayer());
     }
diff --git a/src/de/steamwar/command/SWCommand.java b/src/de/steamwar/command/SWCommand.java
index 3938c61..63bbace 100644
--- a/src/de/steamwar/command/SWCommand.java
+++ b/src/de/steamwar/command/SWCommand.java
@@ -121,7 +121,7 @@ public class SWCommand extends AbstractSWCommand<CommandSender> {
     }
 
     @Register(help = true)
-    private void internalHelp(ProxiedPlayer p, String... args) {
+    public void internalHelp(ProxiedPlayer p, String... args) {
         ChatSender chatSender = ChatSender.of(p);
         try {
             chatSender.prefixless("COMMAND_HELP_HEAD", command.getName());