Necrons

The Necrons are a mysterious xenos species of humanoid, robotic skeletal warriors that have lain dormant in their stasis-tombs for more than 60 million Terran years, though they have begun to awaken at last. They are the soulless creations and former servants of the ancient C’tan, the terrible Star Gods of Aeldari myth. The Necrons are ancient beyond reckoning, predating even the birth of the Aeldari. At long last, however, they are beginning to awaken from their Tomb Worlds, for the galaxy is ripe for conquest and the restoration of the Necron Empire since the disappearance of the Old Ones more than 60 million standard years ago.