While the Hulk is famously Marvel's most rage-filled hero, Wolverine is a close second, and when their powers were combined, Logan tapped his decades of anger for huge new serrated claws that could make even the Hulk himself bleed. The change came as part of Marvel's World War Hulks event, in which major Marvel heroes including Spider-Man, Iceman, and the Thing gained gigantic new forms and powers from a dose of deadly radiation.
Born in the mid-1800s, Wolverine has lived a life filled with intense suffering and darkness. Working for the Weapon X program turning innocents into weapons, Wolverine was tortured, experimented on, and brainwashed, ultimately joining the X-Men with the secret intention of killing Charles Xavier. Thankfully, Professor X helped Wolverine break free of his programming, and he went on to become a true hero, using the rage born of all his suffering to fuel his quest to protect the innocent and punish the guilty.
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In Jeph Loeb and Ed McGuinness' Hulk #21, the Red Hulk's secret plans with the villainous Intelligencia go awry, bathing Marvel's greatest heroes in radiation. Each of these heroes grows into a new form, gaining incredible power so extreme, it will kill them within a day unless they're transformed back. Unlike usual gamma mutations, the heroes don't necessarily become manifestations of their hidden desires, but rather transform to possess more extreme versions of their powers — for example, Cyclops grows multiple eyes to enhance his optic blasts, and Wolverine becomes a feral monstrosity with gigantic, serrated claws and vicious teeth.
Wolverine initially attacks Red Hulk, able to break the indestructible hero's skin with
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