After a small lizard was accidentally doused in an experimental growth serum, it began to grow to monstrous proportions. The military had no choice but to rocket it into space, where it fell into hibernation before landing on another inhabitable planet, where it presumably became the first of that planet's dinosaurs (NOTE: the original story lists this new planet as being Earth, but for logistic's sake, we're dismissing that theory) (AT#9)

In an alternate reality, Droom was one of several giant creatures summoned by the villain Jack O'Lantern to cause havoc on earth. Droom and the rest of the creatures vanished when Jack was defeated. (Supernaturals #4)