Marvel Comics

Onslaught — the psychic entity born from Xavier and Magneto — threatens to destroy the Marvel Universe in this massive crossover event. The X-Men must ally with the Avengers, Fantastic Four and every hero in the Marvel Universe to stop their former mentor turned world-ending threat. The event culminates in the apparent sacrifice of the Avengers and Fantastic Four, launching the Heroes Reborn initiative. This omnibus collects the complete event including all tie-ins from across the Marvel line.