Boomer

Bursting onto the scene in 1989's X-Factor #45, Boomer is a Marvel Copper Age creation brought to life by the accomplished team of Louise Simonson and Paul Smith. With a modest but meaningful footprint across four catalog appearances, this character navigated the pages of X-Factor alongside heavy hitters like Bobby Drake and Cyclops — serious company in the Marvel universe. Short-lived runs can carry real weight in comics history, and Boomer's debut in a landmark mutant title makes this an intriguing find for any dedicated collector of the era.