This is a neat map all taking place pretty much in a single room, similar to Spawned. But unlike Spawned this map is all based around various difficult challenges. Its quite a hard map but if you get stuck there is a walk through included in the map directory. If you like the map make sure to head over to Lahleon's thread to click on his adf.ly link!
Forum - http://www.minecraftforum.net/topic/339010-ac-biome-boss-battle-updated-9232011-over-9000-dl/