Fiends

Fiends are a race of creatures created by Vorokar during the First Era. They lived initially with the Elder God of Darkness on the plane of Malumbris, and fought against Talus, Vikyn, and the celestials in many wars during that time.

However, during this time, Vikyn and three of his archangels (Michael, Azrael, and Eris) conceived a plot to turn the fiends against each other. They imbued Vorokar's generals with minor sparks of divinity, then convinced them to turn on themselves.

The generals split into two groups - the archdemons, who reveled in chaos and wanton destruction, and the archdevils, who favored gradual corruption and believed in law and order. Their followers became known as demons and devils respectfully, with the most powerful of each becoming demon lords and devil lords.

The two groups began the conflict known as the Blood War, a conflict that eventually tore Malumbris apart. The domain of the devils became known as the Hells, whereas the layers wherein the demons dwelled become known as the Abyss.

There is a third group of fiends, however. Those that remained neutral in the Blood War conflict eventually moved to the plane of Gehenna (a piece of Malumbris that was torn off during the initial wars against Heaven) and became known as Yugoloths, a race largely consisting of mercenaries without morals who only seek personal gain.