To defeat his main targets, the X-Men, Lang creates the "X-Sentinels," android doubles of Professor X and the original X-Men. However, the X-Sentinels manage only inferior imitations of the X-Men's powers, and are easily defeated by the new X-Men. Jean Grey then telekinetically forces Lang to crash his mini-gunship into a wall-screen. He is left in a coma with severe brain damage. During this time, Lang's brain is used as a template for the minds of two sentinels, Conscience and a new Master Mold, both of whom are destroyed in an attempt to release a virus which would have killed all mutants and roughly 97% of normal humans on Earth.