90482 Orcus Etruscan equivalent of the Roman Pluto, and later became an alternate name for Pluto. The surface of Orcus is relatively bright with albedo reaching 23%, grey in color and water-rich. The ice is predominantly in crystalline form, which may be related to past cryovolcanic activity. Other compounds like methane or ammonia may also be present. The existence of a satellite allowed astronomers to determine the mass of the system, which is approximately equal to that of the Saturnian moon Tethys. The ratio of masses of Orcus and Vanth is uncertain, possibly anywhere from 1:33 to 1:12. The diameter of Orcus
Orcus (Dungeons & Dragons) promise that his legions will attack Demogorgon, claiming that "I will be there to win your battle for you!" In the adventure "Prince of Demons" in "Dungeon" #150, Orcus commits four legions of 25,000 assorted demons and undead to the invasion of Gaping Maw, including his personal legion that has never been defeated in battle. He leaves command of these legions to his generals, as he desperately wants to be the one to defeat Demogorgon personally, to gain his power and hope to become a god. Orcus arrives in Gaping Maw at the same time the player characters invade, and