The Underworld

The Underworld was a realm featured in Curse of the Lycans. It debuts in the sixteenth episode of the fifth season. It was destroyed in 5x22.

Purpose

 * Unfinished Business- The dearly departed with unfinished business will enter the underworld and there they will remain until they complete their unfinished business.
 * Torturing Souls- Hades' soul became darkened after Ursula made him her un-dead minion. Therefor he misused his newfound godly powers in the underworld to torture souls.