I made this from the Halo Tartarus figure. Here's what I did.
Chopped off the mohawk and goatee.
Cut MU Hulk feet in half and Tartarus feet in half connecting the 2.
Sanded down the bicep bands
Sculpted teeth (mouth still opens and closes)
Added fourth fingers
Resculpted chin
Sculpted a but-load of hair & repainted 95% done.