diff --git a/src/main/java/de/ellpeck/naturesaura/Helper.java b/src/main/java/de/ellpeck/naturesaura/Helper.java
index bd811ae5..98ffe255 100644
--- a/src/main/java/de/ellpeck/naturesaura/Helper.java
+++ b/src/main/java/de/ellpeck/naturesaura/Helper.java
@@ -140,12 +140,12 @@ public final class Helper {
 
     public static ICapabilityProvider makeRechargeProvider(ItemStack stack) {
         return new ICapabilityProvider() {
-            private final IAuraRecharge recharge = () -> {
-                if (stack.getItemDamage() > 0) {
+            private final IAuraRecharge recharge = container -> {
+                int toDrain = 3;
+                if (stack.getItemDamage() > 0 && container.drainAura(toDrain, true) >= toDrain) {
                     stack.setItemDamage(stack.getItemDamage() - 1);
-                    return true;
+                    container.drainAura(toDrain, false);
                 }
-                return false;
             };
 
             @Override
diff --git a/src/main/java/de/ellpeck/naturesaura/aura/chunk/AuraChunk.java b/src/main/java/de/ellpeck/naturesaura/aura/chunk/AuraChunk.java
index a74f2f74..ccd67622 100644
--- a/src/main/java/de/ellpeck/naturesaura/aura/chunk/AuraChunk.java
+++ b/src/main/java/de/ellpeck/naturesaura/aura/chunk/AuraChunk.java
@@ -34,14 +34,14 @@ public class AuraChunk implements ICapabilityProvider, INBTSerializable<NBTTagCo
     public static final int DEFAULT_AURA = 10000;
 
     private final Chunk chunk;
-    private final Map<BlockPos, DrainSpot> drainSpots = new HashMap<>();
+    private final Map<BlockPos, MutableInt> drainSpots = new HashMap<>();
     private boolean needsSync;
 
     public AuraChunk(Chunk chunk) {
         this.chunk = chunk;
     }
 
-    public static void getSpotsInArea(World world, BlockPos pos, int radius, BiConsumer<BlockPos, DrainSpot> consumer) {
+    public static void getSpotsInArea(World world, BlockPos pos, int radius, BiConsumer<BlockPos, MutableInt> consumer) {
         for (int x = (pos.getX() - radius) >> 4; x <= (pos.getX() + radius) >> 4; x++) {
             for (int z = (pos.getZ() - radius) >> 4; z <= (pos.getZ() + radius) >> 4; z++) {
                 Chunk chunk = world.getChunk(x, z);
@@ -55,7 +55,7 @@ public class AuraChunk implements ICapabilityProvider, INBTSerializable<NBTTagCo
 
     public static int getAuraInArea(World world, BlockPos pos, int radius) {
         MutableInt result = new MutableInt(DEFAULT_AURA);
-        getSpotsInArea(world, pos, radius, (blockPos, drainSpot) -> result.add(drainSpot.getAmount()));
+        getSpotsInArea(world, pos, radius, (blockPos, drainSpot) -> result.add(drainSpot.intValue()));
         return result.intValue();
     }
 
@@ -85,8 +85,8 @@ public class AuraChunk implements ICapabilityProvider, INBTSerializable<NBTTagCo
         return closest;
     }
 
-    public void getSpotsInArea(BlockPos pos, int radius, BiConsumer<BlockPos, DrainSpot> consumer) {
-        for (Map.Entry<BlockPos, DrainSpot> entry : this.drainSpots.entrySet()) {
+    public void getSpotsInArea(BlockPos pos, int radius, BiConsumer<BlockPos, MutableInt> consumer) {
+        for (Map.Entry<BlockPos, MutableInt> entry : this.drainSpots.entrySet()) {
             BlockPos drainPos = entry.getKey();
             if (drainPos.distanceSq(pos) <= radius * radius) {
                 consumer.accept(drainPos, entry.getValue());
@@ -95,31 +95,31 @@ public class AuraChunk implements ICapabilityProvider, INBTSerializable<NBTTagCo
     }
 
     public void drainAura(BlockPos pos, int amount) {
-        DrainSpot spot = this.getDrainSpot(pos);
-        spot.drain(amount);
-        if (spot.isEmpty())
+        MutableInt spot = this.getDrainSpot(pos);
+        spot.subtract(amount);
+        if (spot.intValue() == 0)
             this.drainSpots.remove(pos);
         this.markDirty();
     }
 
     public void storeAura(BlockPos pos, int amount) {
-        DrainSpot spot = this.getDrainSpot(pos);
-        spot.store(amount);
-        if (spot.isEmpty())
+        MutableInt spot = this.getDrainSpot(pos);
+        spot.add(amount);
+        if (spot.intValue() == 0)
             this.drainSpots.remove(pos);
         this.markDirty();
     }
 
-    private DrainSpot getDrainSpot(BlockPos pos) {
-        DrainSpot spot = this.drainSpots.get(pos);
+    private MutableInt getDrainSpot(BlockPos pos) {
+        MutableInt spot = this.drainSpots.get(pos);
         if (spot == null) {
-            spot = new DrainSpot(0);
+            spot = new MutableInt();
             this.drainSpots.put(pos, spot);
         }
         return spot;
     }
 
-    public void setSpots(Map<BlockPos, DrainSpot> spots) {
+    public void setSpots(Map<BlockPos, MutableInt> spots) {
         this.drainSpots.clear();
         this.drainSpots.putAll(spots);
     }
@@ -138,27 +138,28 @@ public class AuraChunk implements ICapabilityProvider, INBTSerializable<NBTTagCo
         }
 
         if (world.getTotalWorldTime() % 40 == 0) {
-            for (Map.Entry<BlockPos, DrainSpot> entry : this.drainSpots.entrySet()) {
+            for (Map.Entry<BlockPos, MutableInt> entry : this.drainSpots.entrySet()) {
                 BlockPos pos = entry.getKey();
-                int amount = entry.getValue().getAmount();
+                int amount = entry.getValue().intValue();
                 if (amount < 0) {
                     List<TileEntity> tiles = new ArrayList<>();
                     Helper.getTileEntitiesInArea(world, pos, 25, tile -> {
                         if (tile.hasCapability(Capabilities.auraContainer, null)) {
-                            tiles.add(tile);
+                            IAuraContainer container = tile.getCapability(Capabilities.auraContainer, null);
+                            if (container instanceof ISpotDrainable) {
+                                tiles.add(tile);
+                            }
                         }
                     });
                     if (!tiles.isEmpty()) {
                         for (int i = world.rand.nextInt(10) + 5; i >= 0; i--) {
                             TileEntity tile = tiles.get(world.rand.nextInt(tiles.size()));
                             IAuraContainer container = tile.getCapability(Capabilities.auraContainer, null);
-                            if (!container.isArtificial()) {
-                                int drained = container.drainAura(Math.min(-amount, 5), false);
-                                this.storeAura(pos, drained);
-                                amount += drained;
-                                if (amount >= drained) {
-                                    break;
-                                }
+                            int drained = ((ISpotDrainable) container).drainAuraPassively(-amount, false);
+                            this.storeAura(pos, drained);
+                            amount += drained;
+                            if (amount >= drained) {
+                                break;
                             }
                         }
                     }
@@ -185,10 +186,10 @@ public class AuraChunk implements ICapabilityProvider, INBTSerializable<NBTTagCo
     @Override
     public NBTTagCompound serializeNBT() {
         NBTTagList list = new NBTTagList();
-        for (Map.Entry<BlockPos, DrainSpot> entry : this.drainSpots.entrySet()) {
+        for (Map.Entry<BlockPos, MutableInt> entry : this.drainSpots.entrySet()) {
             NBTTagCompound tag = new NBTTagCompound();
             tag.setLong("pos", entry.getKey().toLong());
-            tag.setInteger("amount", entry.getValue().getAmount());
+            tag.setInteger("amount", entry.getValue().intValue());
             list.appendTag(tag);
         }
 
@@ -205,7 +206,7 @@ public class AuraChunk implements ICapabilityProvider, INBTSerializable<NBTTagCo
             NBTTagCompound tag = (NBTTagCompound) base;
             this.drainSpots.put(
                     BlockPos.fromLong(tag.getLong("pos")),
-                    new DrainSpot(tag.getInteger("amount")));
+                    new MutableInt(tag.getInteger("amount")));
         }
     }
 }
diff --git a/src/main/java/de/ellpeck/naturesaura/aura/chunk/DrainSpot.java b/src/main/java/de/ellpeck/naturesaura/aura/chunk/DrainSpot.java
deleted file mode 100644
index fb69c7d7..00000000
--- a/src/main/java/de/ellpeck/naturesaura/aura/chunk/DrainSpot.java
+++ /dev/null
@@ -1,26 +0,0 @@
-package de.ellpeck.naturesaura.aura.chunk;
-
-public class DrainSpot {
-
-    private int amount;
-
-    public DrainSpot(int amount) {
-        this.amount = amount;
-    }
-
-    public void drain(int amount) {
-        this.amount -= amount;
-    }
-
-    public void store(int amount) {
-        this.amount += amount;
-    }
-
-    public int getAmount() {
-        return this.amount;
-    }
-
-    public boolean isEmpty() {
-        return this.getAmount() == 0;
-    }
-}
diff --git a/src/main/java/de/ellpeck/naturesaura/aura/chunk/ISpotDrainable.java b/src/main/java/de/ellpeck/naturesaura/aura/chunk/ISpotDrainable.java
new file mode 100644
index 00000000..3bbbba82
--- /dev/null
+++ b/src/main/java/de/ellpeck/naturesaura/aura/chunk/ISpotDrainable.java
@@ -0,0 +1,9 @@
+package de.ellpeck.naturesaura.aura.chunk;
+
+import de.ellpeck.naturesaura.aura.container.IAuraContainer;
+
+public interface ISpotDrainable extends IAuraContainer {
+
+    int drainAuraPassively(int amountToDrain, boolean simulate);
+
+}
diff --git a/src/main/java/de/ellpeck/naturesaura/aura/container/BasicAuraContainer.java b/src/main/java/de/ellpeck/naturesaura/aura/container/BasicAuraContainer.java
index 127a9269..0771e342 100644
--- a/src/main/java/de/ellpeck/naturesaura/aura/container/BasicAuraContainer.java
+++ b/src/main/java/de/ellpeck/naturesaura/aura/container/BasicAuraContainer.java
@@ -1,17 +1,14 @@
 package de.ellpeck.naturesaura.aura.container;
 
-import de.ellpeck.naturesaura.aura.container.IAuraContainer;
 import net.minecraft.nbt.NBTTagCompound;
 
 public class BasicAuraContainer implements IAuraContainer {
 
     protected final int maxAura;
-    protected final boolean artificial;
     protected int aura;
 
-    public BasicAuraContainer(int maxAura, boolean artificial) {
+    public BasicAuraContainer(int maxAura) {
         this.maxAura = maxAura;
-        this.artificial = artificial;
     }
 
     @Override
@@ -47,11 +44,6 @@ public class BasicAuraContainer implements IAuraContainer {
         return 0x1E891E;
     }
 
-    @Override
-    public boolean isArtificial() {
-        return this.artificial;
-    }
-
     public void writeNBT(NBTTagCompound compound) {
         compound.setInteger("aura", this.aura);
     }
diff --git a/src/main/java/de/ellpeck/naturesaura/aura/container/FiniteAuraContainer.java b/src/main/java/de/ellpeck/naturesaura/aura/container/FiniteAuraContainer.java
deleted file mode 100644
index f983438e..00000000
--- a/src/main/java/de/ellpeck/naturesaura/aura/container/FiniteAuraContainer.java
+++ /dev/null
@@ -1,14 +0,0 @@
-package de.ellpeck.naturesaura.aura.container;
-
-public class FiniteAuraContainer extends BasicAuraContainer {
-
-    public FiniteAuraContainer(int aura, boolean artificial) {
-        super(aura, artificial);
-        this.aura = aura;
-    }
-
-    @Override
-    public int storeAura(int amountToStore, boolean simulate) {
-        return 0;
-    }
-}
diff --git a/src/main/java/de/ellpeck/naturesaura/aura/container/IAuraContainer.java b/src/main/java/de/ellpeck/naturesaura/aura/container/IAuraContainer.java
index 2d646be4..2c842259 100644
--- a/src/main/java/de/ellpeck/naturesaura/aura/container/IAuraContainer.java
+++ b/src/main/java/de/ellpeck/naturesaura/aura/container/IAuraContainer.java
@@ -10,6 +10,4 @@ public interface IAuraContainer {
     int getMaxAura();
 
     int getAuraColor();
-
-    boolean isArtificial();
 }
diff --git a/src/main/java/de/ellpeck/naturesaura/aura/container/ItemAuraContainer.java b/src/main/java/de/ellpeck/naturesaura/aura/container/ItemAuraContainer.java
index 16c91714..8b54b269 100644
--- a/src/main/java/de/ellpeck/naturesaura/aura/container/ItemAuraContainer.java
+++ b/src/main/java/de/ellpeck/naturesaura/aura/container/ItemAuraContainer.java
@@ -1,6 +1,5 @@
 package de.ellpeck.naturesaura.aura.container;
 
-import de.ellpeck.naturesaura.aura.container.IAuraContainer;
 import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.NBTTagCompound;
 
@@ -8,12 +7,10 @@ public class ItemAuraContainer implements IAuraContainer {
 
     protected final ItemStack stack;
     protected final int maxAura;
-    protected final boolean artificial;
 
-    public ItemAuraContainer(ItemStack stack, int maxAura, boolean artificial) {
+    public ItemAuraContainer(ItemStack stack, int maxAura) {
         this.stack = stack;
         this.maxAura = maxAura;
-        this.artificial = artificial;
     }
 
     @Override
@@ -61,9 +58,4 @@ public class ItemAuraContainer implements IAuraContainer {
     public int getAuraColor() {
         return 0x42a6bc;
     }
-
-    @Override
-    public boolean isArtificial() {
-        return this.artificial;
-    }
 }
diff --git a/src/main/java/de/ellpeck/naturesaura/aura/container/NaturalAuraContainer.java b/src/main/java/de/ellpeck/naturesaura/aura/container/NaturalAuraContainer.java
new file mode 100644
index 00000000..1ea3667c
--- /dev/null
+++ b/src/main/java/de/ellpeck/naturesaura/aura/container/NaturalAuraContainer.java
@@ -0,0 +1,24 @@
+package de.ellpeck.naturesaura.aura.container;
+
+import de.ellpeck.naturesaura.aura.chunk.ISpotDrainable;
+
+public class NaturalAuraContainer extends BasicAuraContainer implements ISpotDrainable {
+
+    private final int drainAmount;
+
+    public NaturalAuraContainer(int aura, int drainAmount) {
+        super(aura);
+        this.aura = aura;
+        this.drainAmount = drainAmount;
+    }
+
+    @Override
+    public int storeAura(int amountToStore, boolean simulate) {
+        return 0;
+    }
+
+    @Override
+    public int drainAuraPassively(int amountToDrain, boolean simulate) {
+        return this.drainAura(Math.min(this.drainAmount, amountToDrain), simulate);
+    }
+}
diff --git a/src/main/java/de/ellpeck/naturesaura/aura/item/IAuraRecharge.java b/src/main/java/de/ellpeck/naturesaura/aura/item/IAuraRecharge.java
index 75302926..b6aee92f 100644
--- a/src/main/java/de/ellpeck/naturesaura/aura/item/IAuraRecharge.java
+++ b/src/main/java/de/ellpeck/naturesaura/aura/item/IAuraRecharge.java
@@ -1,7 +1,9 @@
 package de.ellpeck.naturesaura.aura.item;
 
+import de.ellpeck.naturesaura.aura.container.IAuraContainer;
+
 public interface IAuraRecharge {
 
-    boolean recharge();
+    void rechargeFromContainer(IAuraContainer container);
 
 }
diff --git a/src/main/java/de/ellpeck/naturesaura/blocks/tiles/TileEntityAncientLeaves.java b/src/main/java/de/ellpeck/naturesaura/blocks/tiles/TileEntityAncientLeaves.java
index fe62a753..a7cf5f78 100644
--- a/src/main/java/de/ellpeck/naturesaura/blocks/tiles/TileEntityAncientLeaves.java
+++ b/src/main/java/de/ellpeck/naturesaura/blocks/tiles/TileEntityAncientLeaves.java
@@ -1,13 +1,13 @@
 package de.ellpeck.naturesaura.blocks.tiles;
 
-import de.ellpeck.naturesaura.aura.container.FiniteAuraContainer;
 import de.ellpeck.naturesaura.aura.container.IAuraContainer;
+import de.ellpeck.naturesaura.aura.container.NaturalAuraContainer;
 import net.minecraft.nbt.NBTTagCompound;
 import net.minecraft.util.EnumFacing;
 
 public class TileEntityAncientLeaves extends TileEntityImpl {
 
-    private final FiniteAuraContainer container = new FiniteAuraContainer(20, false) {
+    private final NaturalAuraContainer container = new NaturalAuraContainer(20, 5) {
         @Override
         public int getAuraColor() {
             return 0xc46df9;
diff --git a/src/main/java/de/ellpeck/naturesaura/blocks/tiles/TileEntityNatureAltar.java b/src/main/java/de/ellpeck/naturesaura/blocks/tiles/TileEntityNatureAltar.java
index ac018175..90fb550d 100644
--- a/src/main/java/de/ellpeck/naturesaura/blocks/tiles/TileEntityNatureAltar.java
+++ b/src/main/java/de/ellpeck/naturesaura/blocks/tiles/TileEntityNatureAltar.java
@@ -111,7 +111,7 @@ public class TileEntityNatureAltar extends TileEntityImpl implements ITickable {
         }
     };
 
-    private final BasicAuraContainer container = new BasicAuraContainer(5000, true);
+    private final BasicAuraContainer container = new BasicAuraContainer(5000);
     public boolean structureFine;
 
     private AltarRecipe currentRecipe;
diff --git a/src/main/java/de/ellpeck/naturesaura/events/ClientEvents.java b/src/main/java/de/ellpeck/naturesaura/events/ClientEvents.java
index f3efa113..15e5fda1 100644
--- a/src/main/java/de/ellpeck/naturesaura/events/ClientEvents.java
+++ b/src/main/java/de/ellpeck/naturesaura/events/ClientEvents.java
@@ -53,7 +53,7 @@ public class ClientEvents {
             MutableInt spots = new MutableInt();
             AuraChunk.getSpotsInArea(mc.world, mc.player.getPosition(), 15, ((blockPos, drainSpot) -> {
                 spots.increment();
-                amount.add(drainSpot.getAmount());
+                amount.add(drainSpot.intValue());
             }));
             left.add(prefix + "Aura: " + amount.intValue());
             left.add(prefix + "DrainSpots: " + spots.intValue());
diff --git a/src/main/java/de/ellpeck/naturesaura/items/ItemAuraCache.java b/src/main/java/de/ellpeck/naturesaura/items/ItemAuraCache.java
index aaab202c..0e9efd6b 100644
--- a/src/main/java/de/ellpeck/naturesaura/items/ItemAuraCache.java
+++ b/src/main/java/de/ellpeck/naturesaura/items/ItemAuraCache.java
@@ -39,9 +39,7 @@ public class ItemAuraCache extends ItemImpl implements ITrinketItem {
                 ItemStack stack = player.getHeldItemMainhand();
                 if (stack.hasCapability(Capabilities.auraRecharge, null)) {
                     IAuraContainer container = stackIn.getCapability(Capabilities.auraContainer, null);
-                    if (container.getStoredAura() >= 3 && stack.getCapability(Capabilities.auraRecharge, null).recharge()) {
-                        container.drainAura(4, false);
-                    }
+                    stack.getCapability(Capabilities.auraRecharge, null).rechargeFromContainer(container);
                 }
             }
         }
@@ -78,7 +76,7 @@ public class ItemAuraCache extends ItemImpl implements ITrinketItem {
     @Override
     public ICapabilityProvider initCapabilities(ItemStack stack, @Nullable NBTTagCompound nbt) {
         return new ICapabilityProvider() {
-            private final ItemAuraContainer container = new ItemAuraContainer(stack, 4000, true);
+            private final ItemAuraContainer container = new ItemAuraContainer(stack, 4000);
 
             @Override
             public boolean hasCapability(@Nonnull Capability<?> capability, @Nullable EnumFacing facing) {
diff --git a/src/main/java/de/ellpeck/naturesaura/packet/PacketAuraChunk.java b/src/main/java/de/ellpeck/naturesaura/packet/PacketAuraChunk.java
index 313eda6d..d001efb3 100644
--- a/src/main/java/de/ellpeck/naturesaura/packet/PacketAuraChunk.java
+++ b/src/main/java/de/ellpeck/naturesaura/packet/PacketAuraChunk.java
@@ -3,7 +3,6 @@ package de.ellpeck.naturesaura.packet;
 import de.ellpeck.naturesaura.NaturesAura;
 import de.ellpeck.naturesaura.aura.Capabilities;
 import de.ellpeck.naturesaura.aura.chunk.AuraChunk;
-import de.ellpeck.naturesaura.aura.chunk.DrainSpot;
 import io.netty.buffer.ByteBuf;
 import net.minecraft.client.Minecraft;
 import net.minecraft.util.math.BlockPos;
@@ -14,6 +13,7 @@ import net.minecraftforge.fml.common.network.simpleimpl.IMessageHandler;
 import net.minecraftforge.fml.common.network.simpleimpl.MessageContext;
 import net.minecraftforge.fml.relauncher.Side;
 import net.minecraftforge.fml.relauncher.SideOnly;
+import org.apache.commons.lang3.mutable.MutableInt;
 
 import java.util.HashMap;
 import java.util.Map;
@@ -22,9 +22,9 @@ public class PacketAuraChunk implements IMessage {
 
     private int chunkX;
     private int chunkZ;
-    private Map<BlockPos, DrainSpot> drainSpots;
+    private Map<BlockPos, MutableInt> drainSpots;
 
-    public PacketAuraChunk(int chunkX, int chunkZ, Map<BlockPos, DrainSpot> drainSpots) {
+    public PacketAuraChunk(int chunkX, int chunkZ, Map<BlockPos, MutableInt> drainSpots) {
         this.chunkX = chunkX;
         this.chunkZ = chunkZ;
         this.drainSpots = drainSpots;
@@ -44,7 +44,7 @@ public class PacketAuraChunk implements IMessage {
         for (int i = 0; i < amount; i++) {
             this.drainSpots.put(
                     BlockPos.fromLong(buf.readLong()),
-                    new DrainSpot(buf.readInt())
+                    new MutableInt(buf.readInt())
             );
         }
     }
@@ -55,9 +55,9 @@ public class PacketAuraChunk implements IMessage {
         buf.writeInt(this.chunkZ);
 
         buf.writeInt(this.drainSpots.size());
-        for (Map.Entry<BlockPos, DrainSpot> entry : this.drainSpots.entrySet()) {
+        for (Map.Entry<BlockPos, MutableInt> entry : this.drainSpots.entrySet()) {
             buf.writeLong(entry.getKey().toLong());
-            buf.writeInt(entry.getValue().getAmount());
+            buf.writeInt(entry.getValue().intValue());
         }
     }