Marvin Flumm is a telepathic mutant who was originally recruited into S.H.I.E.L.D.’s ESP division before it was revealed he was plotting to take control of the organisation. Joining forces with the Fixer, the two worked with Hydra for a time, clashing with several heroes.
Flumm can read minds; remotely link with another person’s mind, experiencing that person’s sensory input or vice versa; scan for minds by tracking specific mental patterns; mentally inhabit and control the body of another person; exert more rudimentary control over many minds simultaneously (forcing an angry mob to stop fighting for instance); project his thoughts; enable the minds of others to communicate via telepathic links; cast illusions; and remotely analyze the basic physical characteristics of unseen objects by probing them with psionic energy and reading the psychic feedback. All these powers are effective in his immediate vicinity or, to a lesser extent, over great distances – even many miles away. Often unusually vulnerable to the powers of other telepaths, he has worn a special “ESP-proof” helemt (stolen from S.H.I.E.L.D.) to protect him from telepathic assaults and psychic feedback