diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/Char.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/Char.java
index 9e5b0eebe..23f456a9f 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/Char.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/Char.java
@@ -606,7 +606,7 @@ public abstract class Char extends Actor {
 				new HashSet<Class>( Arrays.asList(Blob.class) )),
 		FIERY ( new HashSet<Class>( Arrays.asList(WandOfFireblast.class)),
 				new HashSet<Class>( Arrays.asList(Burning.class, Blazing.class))),
-		ACIDIC ( new HashSet<Class>( Arrays.asList(ToxicGas.class, Corrosion.class)),
+		ACIDIC ( new HashSet<Class>( Arrays.asList(Corrosion.class)),
 				new HashSet<Class>( Arrays.asList(Ooze.class))),
 		ELECTRIC ( new HashSet<Class>( Arrays.asList(WandOfLightning.class, Shocking.class, Potential.class, Electricity.class, ShockingDart.class)),
 				new HashSet<Class>()),
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/blobs/ToxicGas.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/blobs/ToxicGas.java
index aa9da3ea3..6e1d0c458 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/blobs/ToxicGas.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/blobs/ToxicGas.java
@@ -30,7 +30,6 @@ import com.shatteredpixel.shatteredpixeldungeon.effects.BlobEmitter;
 import com.shatteredpixel.shatteredpixeldungeon.effects.Speck;
 import com.shatteredpixel.shatteredpixeldungeon.messages.Messages;
 import com.shatteredpixel.shatteredpixeldungeon.utils.GLog;
-import com.watabou.utils.Random;
 
 public class ToxicGas extends Blob implements Hero.Doom {
 
@@ -38,7 +37,7 @@ public class ToxicGas extends Blob implements Hero.Doom {
 	protected void evolve() {
 		super.evolve();
 
-		int levelDamage = 5 + Dungeon.depth * 5;
+		int damage = 1 + Dungeon.depth/5;
 
 		Char ch;
 		int cell;
@@ -49,11 +48,6 @@ public class ToxicGas extends Blob implements Hero.Doom {
 				if (cur[cell] > 0 && (ch = Actor.findChar( cell )) != null) {
 					if (!ch.isImmune(this.getClass())) {
 
-						int damage = (ch.HT + levelDamage) / 40;
-						if (Random.Int( 40 ) < (ch.HT + levelDamage) % 40) {
-							damage++;
-						}
-
 						ch.damage(damage, this);
 					}
 				}
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/buffs/Burning.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/buffs/Burning.java
index d08979322..f28974e3a 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/buffs/Burning.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/buffs/Burning.java
@@ -82,7 +82,7 @@ public class Burning extends Buff implements Hero.Doom {
 		
 		if (target.isAlive()) {
 			
-			int damage = Random.NormalIntRange( 1, 3 + target.HT/40 );
+			int damage = Random.NormalIntRange( 1, 3 + Dungeon.depth/4 );
 			Buff.detach( target, Chill.class);
 
 			//FIXME doesn't work with the sad ghost
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/Tengu.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/Tengu.java
index 16ebdb292..e600cdc15 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/Tengu.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/Tengu.java
@@ -26,9 +26,7 @@ import com.shatteredpixel.shatteredpixeldungeon.Badges;
 import com.shatteredpixel.shatteredpixeldungeon.Dungeon;
 import com.shatteredpixel.shatteredpixeldungeon.actors.Actor;
 import com.shatteredpixel.shatteredpixeldungeon.actors.Char;
-import com.shatteredpixel.shatteredpixeldungeon.actors.blobs.ToxicGas;
 import com.shatteredpixel.shatteredpixeldungeon.actors.buffs.LockedFloor;
-import com.shatteredpixel.shatteredpixeldungeon.actors.buffs.Poison;
 import com.shatteredpixel.shatteredpixeldungeon.actors.hero.HeroSubClass;
 import com.shatteredpixel.shatteredpixeldungeon.effects.CellEmitter;
 import com.shatteredpixel.shatteredpixeldungeon.effects.Speck;
@@ -240,11 +238,6 @@ public class Tengu extends Mob {
 			yell(Messages.get(this, "notice_face", Dungeon.hero.givenName()));
 		}
 	}
-	
-	{
-		resistances.add( ToxicGas.class );
-		resistances.add( Poison.class );
-	}
 
 	@Override
 	public void restoreFromBundle(Bundle bundle) {
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/Yog.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/Yog.java
index a6bde8ae3..b64bf4893 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/Yog.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/Yog.java
@@ -357,10 +357,6 @@ public class Yog extends Mob {
 			if (lock != null) lock.addTime(dmg*0.5f);
 		}
 		
-		{
-			resistances.add( ToxicGas.class );
-		}
-		
 		{
 			immunities.add( Amok.class );
 			immunities.add( Sleep.class );