Surtur possesses the giant sword Twilight, also known as the Sword of Doom, composed of a metal known as Scabrite which can only be found in the mines of Surtur's realm. The sword is magical, capable of manipulating vast amounts of mystical energy, and can be used to perform feats such as shattering dimensional barriers and inhibiting Odin's powers. Loki has temporarily tapped into the power of the sword to change Thor into a frog (Thor is normally resistant to this type of magical transformation) and making the Asgardian populace sick (Asgardians are normally immune to disease). Morgan Le Fay tapped into the power of the sword to reshape the entire planet Earth from modern day into a medieval world after using the chaos magic of the Scarlet Witch to "bridge the gap" between her personal faerie powers and the Asgardian magics bound to the blade. When the sword is bonded with the Eternal Flame, its powers are further increased to an unknown level.