This is going to be a series of the things in this dungeon. Not all of them will be so strange, but:
Deadsoil The Crazed: I flipped this name (generated by Seventh Sanctum) around to get: The Crazed Deadsoil, which is less entity like. Then I came up with:
The Crazed Deadsoil: Found on the fifth level of the Octagon Dungeon, The Crazed Deadsoil is a patch of animate gravedirt, similar to an earth elemental. It will reach out arms, like a mimic, if anyone steps on it. It will not move otherwise.