Of all the mutants Marvel introduced for it's comics, do you know gets my vote for most useful mutant power? Doug Ramsey, aka Cypher. He had the intrinsic ability to understand any language, spoken or written, computer, human or alien. That's downright useful. For those not in the know, Cypher was shot by the Genoshans and almost died, but the phalanx entity known as Warlock merged with him and they became Douglock. I'm done being a geek for the moment. Time to play Halo.