Hades' Sword (also known as the Sword of Hades) is Hades' main weapon. It is made of Stygian Iron and contains one of the Keys of Hades. The sword allows the wielder to send anyone to or from the Underworld with the lightest touch. Because Hades already has a symbol of power, the Helm of Darkness, the power of the sword could potentially tip the balance of power in Hades' favor over Zeus' Master Bolt or Poseidon's Trident.