X-Men Legacy: Lost Legions #[nn]

This collection from Marvel's 2012 X-Men Legacy series focuses on the fractured psyche of David Haller, aka Legion, as his multiple personalities vie for control. The story involves Professor Charles Xavier, Magneto, and Rogue grappling with the fallout of Legion's actions, while characters like Frenzy and Gambit play supporting roles in the chaotic narrative. It's a deep dive into mental health and legacy within the X-Men mythos, collecting the climactic chapters of this particular run.