Changeling , masquerading as Professor X , led the X-Men's efforts to defeat the Subterranean Grotesk .
Professor X recruited Changeling to act as a stand - in , unbeknownst to the X-Men , while the Professor isolated himself to prepare a defense against the alien Z'Nox 's invasion .
Changeling , masquerading as Professor X , led the X-Men efforts to defeat the Subterranean Grotesk .
Professor X recruited Changeling to act as a stand - in , unbeknownst to the X-Men , while the Professor isolated himself to prepare a defense against the alien Z'Nox 's invasion .