A lemure is a basic devil just about the weakest of all devils. Of course even something weak is strong with friends! A lemur is a large mound of flesh that leaves a trail of ooz behind everywhere it goes. They are created by melding together souls of the damned. You could go all kinds of ways with these guys, you could simply have it be a nice one off encounter to add some action to your campaign or you could have them be servants of a greater devil that leads the party down an epic adventure of defeating evil!!! You could even make the giant hole a portal into the Underdark! So many things could come from these little guys. Hopefully you get some fun adventuring stories from this. Be safe adventurers!