In CleanOnion's thing! Now, for a superhero.
Spock is a Vulcan. Vulcans have enhanced physical strength and... other things. That makes them superheroes! Mirror Spock is also a Vulcan! As he comes from an alternate reality, he is not affected by your White Mage's remaining antimatter that has somehow not been annihilated by annihilating the Black Mage! Mirror Spock conquers your White Mage's planet with the Enterprise.
Edit: Are we summoning "superheroes" to defeat other "superheroes", or are we just resetting it each time?