diff --git a/src/com/shatteredpixel/shatteredpixeldungeon/levels/CavesLevel.java b/src/com/shatteredpixel/shatteredpixeldungeon/levels/CavesLevel.java
index bfe593be3..59b4b3382 100644
--- a/src/com/shatteredpixel/shatteredpixeldungeon/levels/CavesLevel.java
+++ b/src/com/shatteredpixel/shatteredpixeldungeon/levels/CavesLevel.java
@@ -159,7 +159,7 @@ public class CavesLevel extends RegularLevel {
 		for (Room r : rooms) {
 			if (r.type == Type.STANDARD) {
 				for (Room n : r.neigbours) {
-					if (n.type == Type.STANDARD && !r.connected.containsKey( n )/* && Random.Int( 2 ) == 0*/) {
+					if (n.type == Type.STANDARD && !r.connected.containsKey( n )) {
 						Rect w = r.intersect( n );
 						if (w.left == w.right && w.bottom - w.top >= 5) {
 							
diff --git a/src/com/shatteredpixel/shatteredpixeldungeon/levels/CityBossLevel.java b/src/com/shatteredpixel/shatteredpixeldungeon/levels/CityBossLevel.java
index 2a714796a..ca81d9fe2 100644
--- a/src/com/shatteredpixel/shatteredpixeldungeon/levels/CityBossLevel.java
+++ b/src/com/shatteredpixel/shatteredpixeldungeon/levels/CityBossLevel.java
@@ -18,6 +18,7 @@
 package com.shatteredpixel.shatteredpixeldungeon.levels;
 
 import com.watabou.noosa.Scene;
+import com.watabou.noosa.tweeners.AlphaTweener;
 import com.shatteredpixel.shatteredpixeldungeon.Assets;
 import com.shatteredpixel.shatteredpixeldungeon.Bones;
 import com.shatteredpixel.shatteredpixeldungeon.Dungeon;
@@ -180,14 +181,21 @@ public class CityBossLevel extends Level {
 			
 			Mob boss = Bestiary.mob( Dungeon.depth );
 			boss.state = boss.HUNTING;
+			int count = 0;
 			do {
 				boss.pos = Random.Int( LENGTH );
 			} while (
 				!passable[boss.pos] ||
 				!outsideEntraceRoom( boss.pos ) ||
-				Dungeon.visible[boss.pos]);
+				(Dungeon.visible[boss.pos] && count++ < 20));
 			GameScene.add( boss );
-			
+
+			if (Dungeon.visible[boss.pos]) {
+				boss.notice();
+				boss.sprite.alpha( 0 );
+				boss.sprite.parent.add( new AlphaTweener( boss.sprite, 1, 0.1f ) );
+			}
+
 			set( arenaDoor, Terrain.LOCKED_DOOR );
 			GameScene.updateMap( arenaDoor );
 			Dungeon.observe();
diff --git a/src/com/shatteredpixel/shatteredpixeldungeon/levels/HallsLevel.java b/src/com/shatteredpixel/shatteredpixeldungeon/levels/HallsLevel.java
index 96a70482f..456359715 100644
--- a/src/com/shatteredpixel/shatteredpixeldungeon/levels/HallsLevel.java
+++ b/src/com/shatteredpixel/shatteredpixeldungeon/levels/HallsLevel.java
@@ -85,19 +85,12 @@ public class HallsLevel extends RegularLevel {
 				}
 				
 			} else
-			if (map[i] == Terrain.WALL) {
-				
-				int count = 0;
-				for (int j=0; j < NEIGHBOURS4.length; j++) {
-					if (map[i + NEIGHBOURS4[j]] == Terrain.WATER) {
-						count++;
-					}
-				}
-				
-				if (Random.Int( 4 ) < count) {
-					map[i] = Terrain.WALL_DECO;
-				}
-				
+			if (map[i] == Terrain.WALL &&
+				map[i-1] != Terrain.WALL_DECO && map[i-WIDTH] != Terrain.WALL_DECO &&
+				Random.Int( 20 ) == 0) {
+
+				map[i] = Terrain.WALL_DECO;
+
 			}
 		}
 		
diff --git a/src/com/shatteredpixel/shatteredpixeldungeon/levels/Level.java b/src/com/shatteredpixel/shatteredpixeldungeon/levels/Level.java
index de8492fbe..811739cc9 100644
--- a/src/com/shatteredpixel/shatteredpixeldungeon/levels/Level.java
+++ b/src/com/shatteredpixel/shatteredpixeldungeon/levels/Level.java
@@ -47,6 +47,8 @@ import com.shatteredpixel.shatteredpixeldungeon.items.armor.Armor;
 import com.shatteredpixel.shatteredpixeldungeon.items.artifacts.AlchemistsToolkit;
 import com.shatteredpixel.shatteredpixeldungeon.items.artifacts.DriedRose;
 import com.shatteredpixel.shatteredpixeldungeon.items.artifacts.TimekeepersHourglass;
+import com.shatteredpixel.shatteredpixeldungeon.items.bags.ScrollHolder;
+import com.shatteredpixel.shatteredpixeldungeon.items.bags.SeedPouch;
 import com.shatteredpixel.shatteredpixeldungeon.items.food.Blandfruit;
 import com.shatteredpixel.shatteredpixeldungeon.items.food.Food;
 import com.shatteredpixel.shatteredpixeldungeon.items.potions.Potion;
@@ -54,6 +56,7 @@ import com.shatteredpixel.shatteredpixeldungeon.items.potions.PotionOfHealing;
 import com.shatteredpixel.shatteredpixeldungeon.items.potions.PotionOfMight;
 import com.shatteredpixel.shatteredpixeldungeon.items.potions.PotionOfStrength;
 import com.shatteredpixel.shatteredpixeldungeon.items.rings.RingOfWealth;
+import com.shatteredpixel.shatteredpixeldungeon.items.scrolls.Scroll;
 import com.shatteredpixel.shatteredpixeldungeon.items.scrolls.ScrollOfUpgrade;
 import com.shatteredpixel.shatteredpixeldungeon.items.scrolls.ScrollOfWeaponUpgrade;
 import com.shatteredpixel.shatteredpixeldungeon.levels.features.Chasm;
@@ -116,8 +119,6 @@ public abstract class Level implements Bundlable {
 	private static final String TXT_HIDDEN_PLATE_CLICKS = "A hidden pressure plate clicks!";
 	
 	public static boolean resizingNeeded;
-	// This one can be different from resizingNeeded if the level
-	// was created in the older version of the game
 	public static int loadedMapSize;
 	
 	public int[] map;
@@ -197,7 +198,7 @@ public abstract class Level implements Bundlable {
 				addItemToSpawn( new PotionOfStrength() );
 				Dungeon.limitedDrops.strengthPotions.count++;
 			}
-			if (Dungeon.soeNeeded()) {
+			if (Dungeon.souNeeded()) {
 				addItemToSpawn( new ScrollOfUpgrade() );
                 Dungeon.limitedDrops.upgradeScrolls.count++;
 			}
@@ -369,7 +370,8 @@ public abstract class Level implements Bundlable {
 	}
 	
 	private void adjustMapSize() {
-		// For levels from older saves
+		// For levels saved before 1.6.3
+		// Seeing as shattered started on 1.7.1 this is never used, but the code may be resused in future.
 		if (map.length < LENGTH) {
 			
 			resizingNeeded = true;
@@ -414,10 +416,13 @@ public abstract class Level implements Bundlable {
 	}
 	
 	abstract protected boolean build();
+
 	abstract protected void decorate();
+
 	abstract protected void createMobs();
+
 	abstract protected void createItems();
-	
+
 	public void addVisuals( Scene scene ) {
 		for (int i=0; i < LENGTH; i++) {
 			if (pit[i]) {
@@ -597,11 +602,13 @@ public abstract class Level implements Bundlable {
 	
 	public Heap drop( Item item, int cell ) {
 
+		//This messy if statement deals will items which should not drop in challenges primarily.
         if ((Dungeon.isChallenged( Challenges.NO_FOOD ) && (item instanceof Food || item instanceof BlandfruitBush.Seed)) ||
             (Dungeon.isChallenged( Challenges.NO_ARMOR ) && item instanceof Armor) ||
             (Dungeon.isChallenged( Challenges.NO_HEALING ) && item instanceof PotionOfHealing) ||
-            (Dungeon.isChallenged( Challenges.NO_HERBALISM ) && (item instanceof Plant.Seed || item instanceof Dewdrop)) ||
-            item == null) {
+            (Dungeon.isChallenged( Challenges.NO_HERBALISM ) && (item instanceof Plant.Seed || item instanceof Dewdrop || item instanceof SeedPouch)) ||
+	        (Dungeon.isChallenged( Challenges.NO_SCROLLS ) && ((item instanceof Scroll && !(item instanceof ScrollOfUpgrade)) || item instanceof ScrollHolder)) ||
+			item == null) {
 
             Heap heap = new Heap();
             GameScene.add( heap );
diff --git a/src/com/shatteredpixel/shatteredpixeldungeon/levels/RegularLevel.java b/src/com/shatteredpixel/shatteredpixeldungeon/levels/RegularLevel.java
index edac2a734..c1691e9e1 100644
--- a/src/com/shatteredpixel/shatteredpixeldungeon/levels/RegularLevel.java
+++ b/src/com/shatteredpixel/shatteredpixeldungeon/levels/RegularLevel.java
@@ -627,6 +627,9 @@ public abstract class RegularLevel extends Level {
 			case 4:
 				type = Heap.Type.CHEST;
 				break;
+			case 5:
+				type = Dungeon.depth > 1 ? Heap.Type.MIMIC : Heap.Type.CHEST;
+				break;
 			default:
 				type = Heap.Type.HEAP;
 			}
diff --git a/src/com/shatteredpixel/shatteredpixeldungeon/levels/Room.java b/src/com/shatteredpixel/shatteredpixeldungeon/levels/Room.java
index f5ce5ad2e..363f2ad30 100644
--- a/src/com/shatteredpixel/shatteredpixeldungeon/levels/Room.java
+++ b/src/com/shatteredpixel/shatteredpixeldungeon/levels/Room.java
@@ -238,18 +238,4 @@ public class Room extends Rect implements Graph.Node, Bundlable {
 			}
 		}
 	}
-}
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+}
\ No newline at end of file