Coriantumr’s Sword is the weapon on which Coriantumr supported himself during his final encounter with Shiz. When only the two men remained, “Coriantumr had leaned upon his sword” so that he could rest (Ether 15:30).
After resting, Coriantumr used the weapon against his last opponent and “smote off the head of Shiz.” Shiz then raised himself on his hands, struggled for breath, and died (Ether 15:30).