The Stonebreaker was originally created in Asgard as a powerful weapon that could level mountains. It was given to Kuuroth, one of the Worthy of the Serpent, Cul. Following the Serpents original defeat, Kuuroth was imprisoned in his hammer along with the rest of the Worthy. Following the return of the Serpent centuries later, Kuuroth was freed in the body of Cain Marko, when the Stonebreaker crashed and destroyed the Raft. With the power of both Cyttorak and Stonebreaker, Kuuroth was almost unstoppable, but following the defeat of the Serpent, the Stonebreaker returned to the Raft wear it is under guard by Luke Cage.