Boom Boom

Near Washington, D.C., a train was wrecked, on a whim, by the cosmic entity calling itself the Beyonder. Thinking he was a mutant, Tabitha accompanied The Beyonder. The Beyonder abandoned her, but returned and took her to Professor Xavier's school. The X-Men and New Mutants attacked the Beyonder, who escaped, and Tabitha, frightened and bewildered by witnessing the attack, left. She was later found by the Beyonder, who brought her to a distant planet that he called "World Complex Headquarters" of the alien Celestials. There, threatening to destroy the universe, the Beyonder fought and seemingly defeated a number of Celestials. However, that planet was not truly the Celestials' headquarters, and the Celestials allowed the Beyonder to "defeat" them, presumably in order to observe him in action.

Terrified, Tabitha demanded that the Beyonder transport her back to Earth and leave her alone; the Beyonder complied. Back on Earth, Tabitha alerted the Avengers about the Beyonder. Summoning him, Tabitha led him into an ambush by the Avengers and other costumed champions before fleeing the scene. The Beyonder, who had regarded Tabitha as his only friend, allowed the Avengers to defeat him.