Landon was friends with Dr. Hank McCoy, a mutant. McCoy did not want to change and tried to develop a formula to reverse his mutation. He eventually gave up that research and joined the X-Men. However, Landon used his research to find a way to eradicate humans.

Hobgoblin discovered what he was doing, he began threatening Landon, forcing Landon to bribe him to keep his mouth shut. After a brawl ensued between Spider-Man, Hobgoblin and Wolverine, Landon was doused in the chemical and was turned into a thirty foot monster capable of absorbing massive amounts of energy and firing deadly blasts. However, he needed such a massive amount of energy that he was in constant agony from hunger, causing him to attack wildly and consume all sources of energy in his path. Spider-Man and the X-Men would stop him, and mostly restore his human form.