diff --git a/src/java/mmm/world/WBiomeHelper.java b/src/java/mmm/world/WBiomeHelper.java
new file mode 100644
index 0000000..6fa7e67
--- /dev/null
+++ b/src/java/mmm/world/WBiomeHelper.java
@@ -0,0 +1,231 @@
+package mmm.world;
+
+
+import java.util.EnumMap;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.function.Function;
+
+import net.minecraft.world.biome.Biome;
+import net.minecraftforge.common.BiomeDictionary;
+import net.minecraftforge.common.BiomeManager;
+import net.minecraftforge.common.BiomeManager.BiomeType;
+import net.minecraftforge.fml.common.registry.GameRegistry;
+
+
+
+public class WBiomeHelper
+{
+
+	private static final String BIOME_REG_BASE = "mmm:biome/";
+
+	private final Function< WBiomeHelper , ? extends Biome > constructor;
+
+	private String name;
+	private String regPath;
+	private String mutationBase;
+	private float baseHeight;
+	private float heightVariation;
+	private float rainfall;
+	private float temperature;
+	private int waterColor = 0xffffff;
+	private final EnumMap< BiomeType , Integer > biomeTypes = new EnumMap<>( BiomeType.class );
+	private EnumMap< BiomeDictionary.Type , BiomeDictionary.Type > bdTags;
+	private final HashMap< String , Object > extra = new HashMap<>( );
+
+	private Biome.BiomeProperties cachedProperties;
+
+
+	public WBiomeHelper( final Function< WBiomeHelper , ? extends Biome > constructor )
+	{
+		this.constructor = constructor;
+	}
+
+
+	public WBiomeHelper startMutation( )
+	{
+		this.mutationBase = WBiomeHelper.BIOME_REG_BASE + this.regPath;
+		this.cachedProperties = null;
+		return this;
+	}
+
+
+	public WBiomeHelper clearMutation( )
+	{
+		this.mutationBase = null;
+		this.cachedProperties = null;
+		return this;
+	}
+
+
+	public WBiomeHelper setNames( final String name , final String regPath )
+	{
+		this.name = name;
+		this.regPath = regPath;
+		this.cachedProperties = null;
+		return this;
+	}
+
+
+	public WBiomeHelper setElevation( final float baseHeight , final float variation )
+	{
+		this.baseHeight = baseHeight;
+		this.heightVariation = variation;
+		this.cachedProperties = null;
+		return this;
+	}
+
+
+	public WBiomeHelper setWeather( final float rainfall , final float temperature )
+	{
+		this.rainfall = rainfall;
+		this.temperature = temperature;
+		this.cachedProperties = null;
+		return this;
+	}
+
+
+	public WBiomeHelper setWaterColor( final int filter )
+	{
+		this.waterColor = filter;
+		this.cachedProperties = null;
+		return this;
+	}
+
+
+	public WBiomeHelper setType( final BiomeType biomeType , final int weight )
+	{
+		if ( weight > 0 ) {
+			this.biomeTypes.put( biomeType , weight );
+		} else {
+			this.biomeTypes.remove( biomeType );
+		}
+		return this;
+	}
+
+
+	public WBiomeHelper clearTags( )
+	{
+		this.bdTags = null;
+		return this;
+	}
+
+
+	public WBiomeHelper setTags( final BiomeDictionary.Type... tags )
+	{
+		if ( this.bdTags == null ) {
+			this.bdTags = new EnumMap<>( BiomeDictionary.Type.class );
+		}
+		for ( final BiomeDictionary.Type tag : tags ) {
+			this.bdTags.put( tag , tag );
+		}
+		return this;
+	}
+
+
+	public WBiomeHelper removeTags( final BiomeDictionary.Type... tags )
+	{
+		if ( this.bdTags == null ) {
+			return this;
+		}
+		for ( final BiomeDictionary.Type tag : tags ) {
+			this.bdTags.remove( tag );
+		}
+		if ( this.bdTags.isEmpty( ) ) {
+			this.bdTags = null;
+		}
+		return this;
+	}
+
+
+	public WBiomeHelper setExtraProperty( final String name )
+	{
+		this.extra.put( name , name );
+		return this;
+	}
+
+
+	public WBiomeHelper setExtraProperty( final String name , final Object value )
+	{
+		this.extra.put( name , value );
+		return this;
+	}
+
+
+	public WBiomeHelper removeExtraProperty( final String name )
+	{
+		this.extra.remove( name );
+		return this;
+	}
+
+
+	public boolean hasExtraProperty( final String name )
+	{
+		return this.extra.containsKey( name );
+	}
+
+
+	public < T > T getExtraProperty( final String name , final Class< T > cls )
+	{
+		return this.getExtraProperty( name , cls , null );
+	}
+
+
+	public < T > T getExtraProperty( final String name , final Class< T > cls , final T defaultValue )
+	{
+		final Object value = this.extra.get( name );
+		if ( value == null ) {
+			return defaultValue;
+		}
+		return cls.cast( value );
+	}
+
+
+	public Biome.BiomeProperties getProperties( )
+	{
+		if ( this.cachedProperties != null ) {
+			return this.cachedProperties;
+		}
+
+		final Biome.BiomeProperties rv = new Biome.BiomeProperties( this.name ) //
+				.setBaseHeight( this.baseHeight ) //
+				.setHeightVariation( this.heightVariation ) //
+				.setRainfall( this.rainfall ) //
+				.setTemperature( this.temperature ) //
+				.setWaterColor( this.waterColor ) //
+		;
+
+		if ( this.mutationBase != null ) {
+			rv.setBaseBiome( this.mutationBase );
+		}
+		if ( this.temperature <= .1f ) {
+			rv.setSnowEnabled( );
+		}
+		if ( this.rainfall == 0 ) {
+			rv.setRainDisabled( );
+		}
+		this.cachedProperties = rv;
+		return rv;
+	}
+
+
+	public Biome register( )
+	{
+		final Biome biome = this.constructor.apply( this );
+		biome.setRegistryName( WBiomeHelper.BIOME_REG_BASE + this.regPath );
+		this.cachedProperties = null;
+		GameRegistry.register( biome );
+		for ( final Map.Entry< BiomeType , Integer > entry : this.biomeTypes.entrySet( ) ) {
+			BiomeManager.addBiome( entry.getKey( ) , new BiomeManager.BiomeEntry( biome , entry.getValue( ) ) );
+		}
+		if ( this.bdTags == null ) {
+			BiomeDictionary.makeBestGuess( biome );
+		} else {
+			for ( final BiomeDictionary.Type tag : this.bdTags.keySet( ) ) {
+				BiomeDictionary.registerBiomeType( biome , tag );
+			}
+		}
+		return biome;
+	}
+
+}
diff --git a/src/java/mmm/world/World.java b/src/java/mmm/world/World.java
index 6eb63fe..6a3a49d 100644
--- a/src/java/mmm/world/World.java
+++ b/src/java/mmm/world/World.java
@@ -49,15 +49,34 @@ public class World
 		BiomeManager.addBiome( BiomeType.WARM , new BiomeManager.BiomeEntry( BIOME_LIMESTONE_HILLS_EDGE , 5 ) );
 		BiomeDictionary.makeBestGuess( World.BIOME_LIMESTONE_HILLS_EDGE );
 
-		// TEST REMOVE THIS XXX FIXME LOL
-		WBLimestonePlateau testLol = new WBLimestonePlateau( false ,
-				( new Biome.BiomeProperties( "LOL TEST" ) ).setBaseHeight( 0.5F ).setHeightVariation( 0.02F )
-						.setTemperature( 0.8F ).setRainfall( 0.4F ).setWaterColor( 0xe0ff7f ) );
-		testLol.setRegistryName( "mmm:test_lol" );
-		GameRegistry.register( testLol );
-		BiomeManager.addBiome( BiomeType.COOL , new BiomeManager.BiomeEntry( testLol , 25 ) );
-		BiomeManager.addBiome( BiomeType.WARM , new BiomeManager.BiomeEntry( testLol , 25 ) );
-		BiomeDictionary.makeBestGuess( testLol );
+		WBiomeHelper helper = new WBiomeHelper( WBLimestonePlateau::new );
+		helper.setNames( "Limestone Plateau" , "limestone_plateau" ) //
+				.setElevation( .5f , .02f ) //
+				.setWeather( .6f , .5f ) //
+				.setWaterColor( 0xe0ff7f ) //
+				.setType( BiomeType.COOL , 5 ) //
+				.setType( BiomeType.WARM , 5 ) //
+				.register( );
+		helper.startMutation( );
+		helper.setNames( "Chaotic Limestone Plateau" , "limestone_plateau/chaos" )//
+				.setWeather( .8f , .5f ) //
+				.setElevation( .6f , .07f ) //
+				.setType( BiomeType.COOL , 1 ) //
+				.setType( BiomeType.WARM , 1 ) //
+				.setExtraProperty( "ChaosChance" , 4 ) //
+				.register( );
+		helper.setNames( "Chaotic Limestone Forest" , "limestone_plateau/chaos_forest" ) //
+				.setExtraProperty( "Trees" )//
+				.setType( BiomeType.COOL , 5 ) //
+				.setType( BiomeType.WARM , 5 ) //
+				.register( );
+		helper.setNames( "Limestone Forest" , "limestone_plateau/forest" ) //
+				.setElevation( .5f , .02f ) //
+				.setWeather( .7f , .5f ) //
+				.setType( BiomeType.COOL , 5 ) //
+				.setType( BiomeType.WARM , 5 ) //
+				.removeExtraProperty( "ChaosChance" )//
+				.register( );
 	}
 
 
diff --git a/src/java/mmm/world/biome/WBLimestonePlateau.java b/src/java/mmm/world/biome/WBLimestonePlateau.java
index 566196f..a5d5a26 100644
--- a/src/java/mmm/world/biome/WBLimestonePlateau.java
+++ b/src/java/mmm/world/biome/WBLimestonePlateau.java
@@ -5,6 +5,7 @@ import java.util.Random;
 
 import mmm.materials.Materials;
 import mmm.world.I_WDefaultPopulateHandler;
+import mmm.world.WBiomeHelper;
 import mmm.world.gen.WGLimestoneChaos;
 import net.minecraft.block.BlockDirt;
 import net.minecraft.block.material.Material;
@@ -13,7 +14,10 @@ import net.minecraft.init.Blocks;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
 import net.minecraft.world.biome.Biome;
+import net.minecraft.world.gen.feature.WorldGenAbstractTree;
 import net.minecraft.world.gen.feature.WorldGenLakes;
+import net.minecraft.world.gen.feature.WorldGenTaiga1;
+import net.minecraft.world.gen.feature.WorldGenTaiga2;
 import net.minecraftforge.event.terraingen.PopulateChunkEvent;
 
 
@@ -26,26 +30,46 @@ public class WBLimestonePlateau
 			BlockDirt.DirtType.COARSE_DIRT );
 	private static final IBlockState BS_LIMESTONE = Materials.ROCK_LIMESTONE.getDefaultState( );
 
+	private static final WorldGenTaiga1 PINE_GENERATOR = new WorldGenTaiga1( );
+	private static final WorldGenTaiga2 SPRUCE_GENERATOR = new WorldGenTaiga2( false );
+
 	private final int chaosChance;
 
 
-	public WBLimestonePlateau( final boolean trees , final BiomeProperties properties )
+	public WBLimestonePlateau( final WBiomeHelper helper )
 	{
-		super( properties );
+		super( helper.getProperties( ) );
 
+		final boolean trees = helper.hasExtraProperty( "Trees" );
 		if ( trees ) {
 			this.theBiomeDecorator.treesPerChunk = 5;
-			this.theBiomeDecorator.flowersPerChunk = 2;
-			this.theBiomeDecorator.grassPerChunk = 0;
+			this.theBiomeDecorator.flowersPerChunk = 4;
+			this.theBiomeDecorator.grassPerChunk = 1;
 		} else {
 			this.theBiomeDecorator.treesPerChunk = 0;
 			this.theBiomeDecorator.flowersPerChunk = 8;
-			this.theBiomeDecorator.grassPerChunk = 1;
+			this.theBiomeDecorator.grassPerChunk = 3;
 		}
 		this.theBiomeDecorator.field_189870_A = 0.1f;
 		this.topBlock = Blocks.GRASS.getDefaultState( );
 		this.fillerBlock = Blocks.DIRT.getDefaultState( );
-		this.chaosChance = 4; // XXX
+		this.chaosChance = helper.getExtraProperty( "ChaosChance" , Integer.class , 32 );
+	}
+
+
+	@Override
+	public WorldGenAbstractTree genBigTreeChance( final Random rand )
+	{
+		final int rnd = rand.nextInt( 20 );
+		if ( rnd < 1 ) {
+			return Biome.BIG_TREE_FEATURE;
+		} else if ( rnd < 5 ) {
+			return Biome.TREE_FEATURE;
+		} else if ( rnd < 7 ) {
+			return WBLimestonePlateau.PINE_GENERATOR;
+		} else {
+			return WBLimestonePlateau.SPRUCE_GENERATOR;
+		}
 	}
 
 
@@ -111,7 +135,7 @@ public class WBLimestonePlateau
 	private void replaceWithLimestone( final World worldIn , final Random rand , final BlockPos.MutableBlockPos mbp )
 	{
 		if ( rand.nextInt( 8 ) != 0 ) {
-			worldIn.setBlockState( mbp , BS_LIMESTONE );
+			worldIn.setBlockState( mbp , WBLimestonePlateau.BS_LIMESTONE );
 		}
 	}
 
@@ -119,7 +143,7 @@ public class WBLimestonePlateau
 	private void replaceWithCoarseDirt( final World worldIn , final Random rand , final BlockPos.MutableBlockPos mbp )
 	{
 		if ( rand.nextInt( 16 ) == 0 ) {
-			worldIn.setBlockState( mbp , BS_COARSE_DIRT );
+			worldIn.setBlockState( mbp , WBLimestonePlateau.BS_COARSE_DIRT );
 		}
 	}