Hours later, an older Bart Allen, dressed in his grandfather's costume, emerges from the Speed Force and tells the heroine Doctor Light to warn the other heroes that Superboy-Prime has escaped. During a battle between Alexander Luthor and the heroes freed from his tower, Superboy-Prime appears, wearing a power suit modeled after the Anti-Monitor's armor, which constantly feeds him yellow solar energy and boosts his power levels. During the battle, Black Adam discovers that magic has little effect against Superboy-Prime. Superboy-Prime knocks Adam away from the tower, and his opponent is transported to Earth-S. Superboy-Prime insists that Luthor reinstate Earth Prime as the only existing Earth. After Superboy-Prime attempts to kill Wonder Girl (Cassie Sandsmark), an enraged Conner Kent attacks him. Conner and Superboy-Prime's battle sends them both headlong into Alexander Luthor's vibrational tuning fork with the effects causing the machine to explode and resulting in the alternate Earths merging into one. Conner dies from injuries sustained during the explosion, leaving the rest of the superheroes devastated.