Follow-up event to Fatal Attractions that pitted the Avengers and X-Men against Fabian Cortez and Exodus in battle on the island of Genosha.

Cortez attempted to shield himself from his former master's wrath by kidnapping Magneto's granddaughter Luna. However, as Luna's father Quicksilver had strong ties to the X-Men and her mother Crystal was a member of the Avengers, both teams became involved in the Genoshan conflict. The situation was further complicated by Magneto's lieutenant and self-proclaimed heir Exodus, who sought to kill both Cortez for his betrayal and Luna for "disgracing" Magneto's line by being merely human.