We once again visit an old favorite instance, this time the Blackfathom Deeps in Ashenvale. The instance is an ancient temple dedicated to the Old Gods and now occupied by the Twilight Hammer cult. The cult has joined forces with the naga and corrupted satyr in the area to occupy the temple and protect and worship the creature Aku'mai.

You can find the full guide here: TenTonHammer's Guide to Blackfathom Deeps .