X-Men Blue #3 Mora Variant

(W) Cullen Bunn (A) Jorge Molina (CA) Dan Mora. . The X-MEN and SENTINELS get along like a house on fire? . ?until the X-Men meet a group of Sentinels asking for help. . What could these old foes want? And where do they come from? And why are they calling themselves?mutants? Rated T+