Mendel Stromm was a scientist employed by Oscorp to develop Human Performance Enhancers, although he expressed doubts in the Enhancers' effectiveness because the initial mouse test subjects having demonstrated violent insanity. Despite his doubts, he assisted Norman Osborn in his attempt to use the still-unstable serum on himself. After acquiring his powers, Osborn's resulting 'Goblin' personality killed Stromm in an uncontrollable rage.