diff --git a/src/main/java/de/ellpeck/naturesaura/api/NaturesAuraAPI.java b/src/main/java/de/ellpeck/naturesaura/api/NaturesAuraAPI.java
index 2272af57..af9d512f 100644
--- a/src/main/java/de/ellpeck/naturesaura/api/NaturesAuraAPI.java
+++ b/src/main/java/de/ellpeck/naturesaura/api/NaturesAuraAPI.java
@@ -42,7 +42,7 @@ public final class NaturesAuraAPI {
 
     public static final String MOD_ID = "naturesaura";
     public static final String API_ID = MOD_ID + "api";
-    public static final String VERSION = "8";
+    public static final String VERSION = "9";
 
     /**
      * The list of all {@link AltarRecipe} instances which are the recipes used
diff --git a/src/main/java/de/ellpeck/naturesaura/api/aura/container/BasicAuraContainer.java b/src/main/java/de/ellpeck/naturesaura/api/aura/container/BasicAuraContainer.java
index dc5bbd57..8abea1c0 100644
--- a/src/main/java/de/ellpeck/naturesaura/api/aura/container/BasicAuraContainer.java
+++ b/src/main/java/de/ellpeck/naturesaura/api/aura/container/BasicAuraContainer.java
@@ -49,7 +49,7 @@ public class BasicAuraContainer implements IAuraContainer {
 
     @Override
     public boolean isAcceptableType(IAuraType type) {
-        return this.type == null || this.type == type;
+        return this.type == null || this.type.isSimilar(type);
     }
 
     public void writeNBT(NBTTagCompound compound) {
diff --git a/src/main/java/de/ellpeck/naturesaura/api/aura/type/IAuraType.java b/src/main/java/de/ellpeck/naturesaura/api/aura/type/IAuraType.java
index 9db8571b..88a9c468 100644
--- a/src/main/java/de/ellpeck/naturesaura/api/aura/type/IAuraType.java
+++ b/src/main/java/de/ellpeck/naturesaura/api/aura/type/IAuraType.java
@@ -21,4 +21,8 @@ public interface IAuraType {
     int getColor();
 
     int getPriority();
+
+    default boolean isSimilar(IAuraType type) {
+        return this == type;
+    }
 }
diff --git a/src/main/java/de/ellpeck/naturesaura/blocks/BlockOakGenerator.java b/src/main/java/de/ellpeck/naturesaura/blocks/BlockOakGenerator.java
index 6d1454a0..065d8324 100644
--- a/src/main/java/de/ellpeck/naturesaura/blocks/BlockOakGenerator.java
+++ b/src/main/java/de/ellpeck/naturesaura/blocks/BlockOakGenerator.java
@@ -2,6 +2,7 @@ package de.ellpeck.naturesaura.blocks;
 
 import de.ellpeck.naturesaura.Helper;
 import de.ellpeck.naturesaura.api.NaturesAuraAPI;
+import de.ellpeck.naturesaura.api.aura.type.IAuraType;
 import de.ellpeck.naturesaura.api.render.IVisualizable;
 import de.ellpeck.naturesaura.blocks.tiles.TileEntityOakGenerator;
 import net.minecraft.block.BlockSapling;
@@ -32,7 +33,7 @@ public class BlockOakGenerator extends BlockContainerImpl implements IVisualizab
     public void onTreeGrow(SaplingGrowTreeEvent event) {
         World world = event.getWorld();
         BlockPos pos = event.getPos();
-        if (!world.isRemote && NaturesAuraAPI.TYPE_OVERWORLD.isPresentInWorld(world)
+        if (!world.isRemote && IAuraType.forWorld(world).isSimilar(NaturesAuraAPI.TYPE_OVERWORLD)
                 && world.getBlockState(pos).getBlock() instanceof BlockSapling) {
             Helper.getTileEntitiesInArea(world, pos, 10, tile -> {
                 if (!(tile instanceof TileEntityOakGenerator))
diff --git a/src/main/java/de/ellpeck/naturesaura/blocks/tiles/TileEntityFlowerGenerator.java b/src/main/java/de/ellpeck/naturesaura/blocks/tiles/TileEntityFlowerGenerator.java
index f436ad13..ef56d8b5 100644
--- a/src/main/java/de/ellpeck/naturesaura/blocks/tiles/TileEntityFlowerGenerator.java
+++ b/src/main/java/de/ellpeck/naturesaura/blocks/tiles/TileEntityFlowerGenerator.java
@@ -3,6 +3,7 @@ package de.ellpeck.naturesaura.blocks.tiles;
 import de.ellpeck.naturesaura.Helper;
 import de.ellpeck.naturesaura.api.NaturesAuraAPI;
 import de.ellpeck.naturesaura.api.aura.chunk.IAuraChunk;
+import de.ellpeck.naturesaura.api.aura.type.IAuraType;
 import de.ellpeck.naturesaura.packet.PacketHandler;
 import de.ellpeck.naturesaura.packet.PacketParticleStream;
 import de.ellpeck.naturesaura.packet.PacketParticles;
@@ -53,7 +54,7 @@ public class TileEntityFlowerGenerator extends TileEntityImpl implements ITickab
             int addAmount = 25000;
             int toAdd = Math.max(0, addAmount - curr.getValue() * 100);
             if (toAdd > 0) {
-                if (NaturesAuraAPI.TYPE_OVERWORLD.isPresentInWorld(this.world) && this.canGenerateRightNow(30, toAdd)) {
+                if (IAuraType.forWorld(this.world).isSimilar(NaturesAuraAPI.TYPE_OVERWORLD) && this.canGenerateRightNow(30, toAdd)) {
                     int remain = toAdd;
                     while (remain > 0) {
                         BlockPos spot = IAuraChunk.getLowestSpot(this.world, this.pos, 30, this.pos);
diff --git a/src/main/java/de/ellpeck/naturesaura/chunk/effect/GrassDieEffect.java b/src/main/java/de/ellpeck/naturesaura/chunk/effect/GrassDieEffect.java
index ebbf1785..7d93da1f 100644
--- a/src/main/java/de/ellpeck/naturesaura/chunk/effect/GrassDieEffect.java
+++ b/src/main/java/de/ellpeck/naturesaura/chunk/effect/GrassDieEffect.java
@@ -83,7 +83,7 @@ public class GrassDieEffect implements IDrainSpotEffect {
 
     @Override
     public boolean appliesHere(Chunk chunk, IAuraChunk auraChunk, IAuraType type) {
-        return ModConfig.enabledFeatures.grassDieEffect && type == NaturesAuraAPI.TYPE_OVERWORLD;
+        return ModConfig.enabledFeatures.grassDieEffect && type.isSimilar(NaturesAuraAPI.TYPE_OVERWORLD);
     }
 
     @Override
diff --git a/src/main/java/de/ellpeck/naturesaura/chunk/effect/PlantBoostEffect.java b/src/main/java/de/ellpeck/naturesaura/chunk/effect/PlantBoostEffect.java
index 4dc414cc..381986b2 100644
--- a/src/main/java/de/ellpeck/naturesaura/chunk/effect/PlantBoostEffect.java
+++ b/src/main/java/de/ellpeck/naturesaura/chunk/effect/PlantBoostEffect.java
@@ -90,7 +90,7 @@ public class PlantBoostEffect implements IDrainSpotEffect {
 
     @Override
     public boolean appliesHere(Chunk chunk, IAuraChunk auraChunk, IAuraType type) {
-        return ModConfig.enabledFeatures.plantBoostEffect && type == NaturesAuraAPI.TYPE_OVERWORLD;
+        return ModConfig.enabledFeatures.plantBoostEffect && type.isSimilar(NaturesAuraAPI.TYPE_OVERWORLD);
     }
 
     @Override