In the wake of an unprecedented cosmic anomaly, the boundaries separating parallel realities begin to fracture, exposing Earth to threats from across alternate dimensions. As rogue factions, alternate-reality variants, and cosmic entities vie for dominance over the infinite timelines, a new generation of heroes must form fragile alliances across realities. Phase 1 introduces the origins of core heroes, uncovers hidden multiversal relics, and culminates in a desperate stand to prevent the collapse of the prime timeline-setting the stage for the ultimate Multiverse War.