First Trailer For FX’s Marvel Mutant Series LEGION!! Read the full article on AICN I am – Hercules!! The print version of mutant David Charles Haller, introduced in 1985’s New Mutants #25, includes among his abilities reality warping, time travel, telepathy and telekinesis. This print Haller, also known as “Legion,” is Charles Xavier’s son, the result of the randy Xavier impregnating Israel’s ambassador to Great Britain.