Do you want to compare Onslaught with Callisto? Discover the powers, weakness & weapons of Onslaught and Callisto from Onslaught Biography and Callisto Biography. Find out all about Onslaught and Callisto.# Check out how is Onslaught unique and distinct from Callisto. Discover their love interest, sidekicks, family tree and the movies and games list in which Onslaught and Callisto have appeared. Find out everything about them here!