BEAST

BEAST (Hank McCoy) - X-Men #1 (September 1963)

Founding member of the X-Men and X-Factor. Member of Avengers, Defenders, Secret Avengers and S.W.O.R.D. Brilliant scientist. Used serum on himself which gave him ape-like appearance. Powers were later jumpstarted by Sage and gave him cat-like appearance. Possesses secondary mutation. Expert on the Legacy Virus. Retained powers post-M-Day.