White Dwarf hails from Earth-1010, an alternate reality in which Nightcrawler and Rogue are the only surviving members of the X-Men. Recruited into the X-Men three months prior to his eleventh birthday, White Dwarf is considered to be a pre-adoloescent powerhouse. The young mutant is super-strong and super-dense and possesses a high-level intellect geared towards problem-solving.
At some point after joining the X-Men, White Dwarf was whisked away by the Tallus and he joined Blink‘s Exiles. Although his intellectual gifts and super-strength were an asset to the team, White Dwarf was considered a hindrance due to his youth with no one willing to mentor the young mutant.
White Dwarf was created by Cully Hamner for X-Men: Millennial Visions #1 as a member of the X-Men of Earth-1010 (Project Cerebro-X). His second appearance was in X-Men: Millennial Visions #2 as a member of Blink’s Exiles.