V0.2.1 : Unblessed Ankh will now only reset a boss level when the level is locked.

src/com/shatteredpixel/shatteredpixeldungeon/levels/HallsBossLevel.java

@@ -167,6 +167,7 @@ public class HallsBossLevel extends Level {
 		if (!enteredArena && hero == Dungeon.hero && cell != entrance) {
 			
 			enteredArena = true;
+            locked = true;
 			
 			for (int i=ROOM_LEFT-1; i <= ROOM_RIGHT + 1; i++) {
 				doMagic( (ROOM_TOP - 1) * WIDTH + i );
@@ -205,6 +206,7 @@ public class HallsBossLevel extends Level {
 		
 		if (!keyDropped && item instanceof SkeletonKey) {
 			keyDropped = true;
+            locked = false;
 			
 			entrance = stairs;
 			set( entrance, Terrain.ENTRANCE );