Blackfathom Deeps (BFD) is a partially underwater dungeon in northwestern Ashenvale. It is accessed by a stair-lined shaft that requires one to swim through an underwater entrance. The Deeps are comprised of a series of watery caverns leading deep to a temple devoted to the Old Gods. The Twilight's Hammer cult runs this shrine, and joined forces with local naga and satyr to defend the holy creature, Aku'mai the Devourer.