The Sepulchre is a weapon used by the Necrons that is normally outfitted on the largest of their vessels. When activated, it generates a wave of palpable psychic force towards any enemy starship. The crew of the afflicted vessel begin to suffer from visions of horror that leads them to rampaging out of control. If allowed to continue, the crew can damage their own ship unless its captain manages to restore discipline and order. Tomb Ships can be upgraded to include a Sepulchre.