diff --git a/src/main/java/electroblob/wizardry/block/BlockSnare.java b/src/main/java/electroblob/wizardry/block/BlockSnare.java
index 81275b20..807425c0 100644
--- a/src/main/java/electroblob/wizardry/block/BlockSnare.java
+++ b/src/main/java/electroblob/wizardry/block/BlockSnare.java
@@ -18,6 +18,7 @@ import net.minecraft.item.Item;
 import net.minecraft.potion.PotionEffect;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraft.util.BlockRenderLayer;
+import net.minecraft.util.DamageSource;
 import net.minecraft.util.EnumBlockRenderType;
 import net.minecraft.util.EnumFacing;
 import net.minecraft.util.math.AxisAlignedBB;
@@ -62,8 +63,10 @@ public class BlockSnare extends Block implements ITileEntityProvider {
 
 				if(AllyDesignationSystem.isValidTarget(tileentity.getCaster(), entity)){
 
-					entity.attackEntityFrom(MagicDamage.causeDirectMagicDamage(tileentity.getCaster(), DamageType.MAGIC),
-							Spells.snare.getProperty(Spell.DAMAGE).floatValue());
+					DamageSource source = tileentity.getCaster() == null ? DamageSource.CACTUS
+							: MagicDamage.causeDirectMagicDamage(tileentity.getCaster(), DamageType.MAGIC);
+
+					entity.attackEntityFrom(source, Spells.snare.getProperty(Spell.DAMAGE).floatValue());
 
 					((EntityLivingBase)entity).addPotionEffect(new PotionEffect(MobEffects.SLOWNESS,
 							Spells.snare.getProperty(Spell.EFFECT_DURATION).intValue(),
diff --git a/src/main/java/electroblob/wizardry/block/BlockThorns.java b/src/main/java/electroblob/wizardry/block/BlockThorns.java
index 0ceb6035..8e22c841 100644
--- a/src/main/java/electroblob/wizardry/block/BlockThorns.java
+++ b/src/main/java/electroblob/wizardry/block/BlockThorns.java
@@ -137,9 +137,11 @@ public class BlockThorns extends BlockBush implements ITileEntityProvider {
 		TileEntity tileentity = world.getTileEntity(pos);
 
 		if(tileentity instanceof TileEntityPlayerSaveTimed){
-			if(AllyDesignationSystem.isValidTarget(((TileEntityPlayerSaveTimed)tileentity).getCaster(), target)){
-				source = MagicDamage.causeDirectMagicDamage(((TileEntityPlayerSaveTimed)tileentity).getCaster(),
-						MagicDamage.DamageType.MAGIC);
+
+			EntityLivingBase caster = ((TileEntityPlayerSaveTimed)tileentity).getCaster();
+
+			if(caster != null && AllyDesignationSystem.isValidTarget(caster, target)){
+				source = MagicDamage.causeDirectMagicDamage(caster, MagicDamage.DamageType.MAGIC);
 			}else{
 				return false; // Don't attack or slow allies of the caster
 			}