Spoiler Warnings: Who Is The X-Men's Secret Weapon in Second Coming? From New Mutants #14

Spoilers

The X-Men’s secret weapon is David “Legion” Haller, who, with the help of both his father, Charles Xavier, and some sort of helmet, is now able to pick and choose which personality is in control of his mind, thereby giving him the choice of which power and granting the closest thing to sanity the character has ever achieved. The unpredictable nature of his powers makes it that much harder for the Nimrod’s to disable him.

A lifelong reader and self proclaimed continuity guru, Grey is the Editor in Chief of Comics Nexus. Known for his love of Booster Gold, Spider-Girl (the real one), Stephanie Brown, and The Boys. Don't miss The Gold Standard.