Tartarus (AoC Universe)

Tartarus (also known as the Burning Hells) is a chaotic realm of darkness in the Aeon of the Champion story series, the counterpart to the Elysian Fields and location of the Seat of Flames.

The twisted, tortured realm was created when Light and Shadow magic expelled one another. Light was pure, and thus coalesced at the top of the universe to form a world known as the Elysium. Void, however, was impure, and joined itself with various other powers in a highly unstable cross-magic fusion. As such, it is believed to have some link with the chaos planets.

Lore
Tartarus is the unequivocal opponent of Elysium, and served as the base of operations for the Armies of Hell during the first phase of the Great Conflict. Demons originating from Tartarus emerged from the mouth of the deep abyss with one aim: throw the works of the Pantheon into chaos. They battled for millenia against the angels of Elysium, resulting in several attempted sieges on the holy realm itself. None were ultimately successful, as demons found themselves uniquely susceptible to light magic, but the attacks nonetheless kept the Pantheon and their Aesir servants on-guard lest they be overwhelmed.

Following Lucithel's betrayal, the Fusion Staff was forged to replace him, and its creation meant that Tartarus was on the losing side of the Eternal Conflict. With its offensive capabilities taken out and the vast majority of fallen demons left unable to respawn, it seemed as if the forces of Elysium would finally emerge victorious, until Lucithel himself defected to Tartarus, becoming the demon lord Sargamon. Leading the Armies of Hell to Elysium, he butchered his former titan masters; the resulting battle sent the crystals of the Fusion Staff sailing into oblivion.

The vast majority of demons from the Armies of Hell now serve the Marching Horde, an innumerable army of demons, constructs and corrupted races that seek to devour all of Creation in search for the Fusion Staff's crystals.

Trivia

 * Tartarus was formerly known as the Burning Hells, but in the new lore, it is known by its current name.
 * Tartarus is a realm in Greek mythology reserved for the dishonourable/unfaithful dead, its counterpart being Elysium.