Tarturus was a demonic being summoned by TMV once to try to kill Zev, after he betrayed his friends and allied with Blackout. According to TMV, he 'reaped' the grim reaper. He emerged from a glowing red pit, grabbed a scythe and a sword, and teleported inside Zev's ship. He then engaged in battle with him, taking hits from his blaster and launching bones at him. However, Zev realised that Tarturus, being undead, was vulnerable to holy water. He pierced Tarturus' body with bullets made of holy water, destroying him.