X-Men Legacy #21

(W) Simon Spurrier (A) Khoi Pham (CA) Mike Del Mundo. Legion's final showdown with the monster in his mind that wears the face of his deceased father! What's worse: the demonic Professor X has escaped into the real world. What terror will he unleash? This is the climactic story this series has been building to, guest-starring the allies Legion has made along the way...and not all of them will emerge unscathed!