Onslaught Remains Professor X's Biggest Failure in X-Men History
Originally published as: 30 Years Later, Professor X's Biggest Failure Haunts The X-Men
Among the X-Men leader's many mistakes, Professor X's biggest failure was so bad it almost doomed the world. Charles Xavier is the main leader figure for mutantkind, having established the dream of coexistence as the ultimate goal for all heroic mutants.