Rubber Duck
Wolverine
Wolverine's durability operates on an entirely different paradigm. His mutant healing factor represents biological regeneration pushed to theoretical limits. He has recovered from nuclear explosions, complete cellular destruction, and being reduced to his adamantium skeleton. Yet this very capability reveals a fundamental vulnerability: Wolverine requires constant damage to demonstrate his durability. His skeleton, whilst indestructible, causes ongoing stress to his system. The psychological toll of centuries of violence, death, and regeneration has left deep scars that no healing factor can address. He can survive anything but cannot simply exist peacefully as his rubber counterpart does.