Clean and easy. Just the way I likes 'em.

Tore off Sentry's head (his body is part of an upcoming custom) and painted it up to resemble Mr. Stark. Beheaded Prof. X and *viola*.
I'm not sure how I feel about the arms tho - they seem a bit long, so I may end up swapping them out at some point.

Recipe:
-Prof. X body
-Sentry head
-Games Workshop Chaos Black