The only enemies on this floor are the guardians of the Antidote chest and the Monsters found in the various trap rooms. The door in the northeast corner leads up to B1, and the northeast room in the central group contains three chests with some nice Treasure. The chest out in the open contains only an Antidote, and is guarded, but the guardians shouldn't be much of a threat at this point. The new Stalagmite enemies are not especially threatening or interesting.