The creature in Norse mythology prophesied to consume Odin during the final battle is Fenrir, the monstrous wolf. According to the Prose Edda, Fenrir is destined to break free from his bonds during Ragnarök, leading to a catastrophic conflict where he ultimately devours Odin. Fenrir symbolizes primal chaos and the inevitable fate of even the mightiest of gods, highlighting themes of destiny and the struggle against unstoppable forces.