ah now it should work

core/src/main/java/com/volmit/iris/core/commands/CommandEdit.java

@@ -26,6 +26,8 @@ import com.volmit.iris.util.decree.DecreeExecutor;
 import com.volmit.iris.util.decree.DecreeOrigin;
 import com.volmit.iris.util.decree.annotations.Decree;
 import com.volmit.iris.util.decree.annotations.Param;
+import com.volmit.iris.util.decree.specialhandlers.NullableBiomeHandler;
+import com.volmit.iris.util.decree.specialhandlers.NullableRegionHandler;
 import com.volmit.iris.util.format.C;
 import org.bukkit.block.Biome;
 

core/src/main/java/com/volmit/iris/util/decree/specialhandlers/NullableBiomeHandler.java

@@ -0,0 +1,31 @@
+/*
+ *  Iris is a World Generator for Minecraft Bukkit Servers
+ *  Copyright (c) 2024 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.volmit.iris.util.decree.specialhandlers;
+
+import com.volmit.iris.engine.object.IrisBiome;
+import com.volmit.iris.util.decree.exceptions.DecreeParsingException;
+import com.volmit.iris.util.decree.handlers.BiomeHandler;
+
+public class NullableBiomeHandler extends BiomeHandler {
+
+    @Override
+    public IrisBiome parse(String in, boolean force) throws DecreeParsingException {
+        return getPossibilities(in).stream().filter((i) -> toString(i).equalsIgnoreCase(in)).findFirst().orElse(null);
+    }
+}

core/src/main/java/com/volmit/iris/util/decree/specialhandlers/NullableRegionHandler.java

@@ -0,0 +1,31 @@
+/*
+ *  Iris is a World Generator for Minecraft Bukkit Servers
+ *  Copyright (c) 2024 Arcane Arts (Volmit Software)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.volmit.iris.util.decree.specialhandlers;
+
+import com.volmit.iris.engine.object.IrisRegion;
+import com.volmit.iris.util.decree.exceptions.DecreeParsingException;
+import com.volmit.iris.util.decree.handlers.RegionHandler;
+
+public class NullableRegionHandler extends RegionHandler {
+
+    @Override
+    public IrisRegion parse(String in, boolean force) throws DecreeParsingException {
+        return getPossibilities(in).stream().filter((i) -> toString(i).equalsIgnoreCase(in)).findFirst().orElse(null);
+    }
+}