As a member of Blind Faith's Exiles, a Russian mutant group, he helped capture and interrogate Bobby Drake. When Drake revealed himself to be Iceman and a fellow mutant, they all teamed up with X-Factor to rescue mutant prisoners from a facility run by Doppelganger, who used the captive mutants for his experiments. Mentac was able to use his powers to find the weak point in the facility's defenses, enabling the group to attack.
Mutant Intelligence: A computer-like brain allowed him to predict the probability of future events and analyze materials and opponents for weak points.
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