Ultimate X-Men v19 - Absolute Power (2008)

Collects Ultimate X-Men (2001-2009) #94-97.
Regrouping after the devastating battle against Apocalypse, the X-Men encounter a new adversary which seems unstoppable. To fight it, the young mutants must ask themselves: How far are they willing to go and what are they willing to take to raise their game? The answer will test the bonds and shake the team to its very core.