Mentallo

Mentallo (real name Marvin Flumm) is a fictional comic book supervillain, a mutant who appears in books published by Marvel Comics.

After having been fired for cause after attempting a covert takeover of S.H.I.E.L.D., he has since operated as both a freelance criminal and subversive and a high-ranking agent of S.H.I.E.L.D.'s enemy HYDRA. Flumm is usually depicted as using technology to increase his power. He once had a long-term partnership with the Fixer. This partnership effectively ended when the Fixer was invited to join the Thunderbolts.