Screw that. make a new mob type and give the player the right to monstrosity as it on any server as they see fit without making it obvious they're player controlled. Just imagine how much fun it would have been to be that one mob that somehow acts smarter than it should be as it rapes everyone.
Make a contest that allows a player to play as Tojil for a few hours, in the actual fracture.
A experienced group rolls in, ready to take him down np, when SURPRISE, the SCHs and WHMs take triple bites to the face.