Deathfacer was a robot servant of the Alien Monera. Originally a TPC battleship Prometheus, it was manipulated by the said aliens to become their ultimate weapon.

Deathfacer was one of the hallucinations experienced by the Super GUTS members before morphing into Evil Tiga and later Moravia.

A huge robotic weapon created by TPC as the Prometheus battleship, the robot revealed itself back on base after being "mollusionized" by the Monera Aliens. When challenged by Ultraman Dyna, the robot dominated the hero, blocking his attacks and decimating the area with its Gatling gun. After the hero turned into his Miracle Type and its attacks were reflected due to the machine's shield, Deathfacer drifted into the sky and prepared to fire the Neo Maxima Cannon! Dyna managed to escape the blast, but the whole island was reduced to a smoldering crater.

Not long after, Deathfacer was unleashed on Japan. Super GUTS attacked it with little effect. One of the crafts was lodged in a skyscraper. The machine prepared to fire an energy beam, but just before it could get a direct hit, Asuka called on Ultraman Dyna for the rematch.