Durandal

Durandal (デュランダル), otherwise referred commonly as the Sword of the Damned (ダムの刀), the Sword of the Overlord (君主の剣), the Sword in the Stone (石の刀) or less commonly as Caliburn (カリバーン), is the name given a Runic-inscribed magical sword that lay dormant and sealed within the stone of Necropolis. Formally wielded by the First Overlord of the Damned, had it plunged into the stone after his death. Only for it to be pulled out by the chosen Azathoth, officially became the Overlord and had an superior, more stronger power over the Dark Arts, and began the resurrection of fallen ancient heroes with Durandal.