"True Hades Tartarus" Interesting another God-level ability. Hades was the ruler of the dead in Greco-Roman myth, and Tartarus was a Primordial being that was around before the age of the gods, and was the Father of some of the greatest monsters to exist. Both their realms bore their own name.
The land of the Dead was also called "hades", and "Tatarus" was the name of the Pit. Nothing could escape from it and it was bottomless. It was said to exist as far below hades as the Earth was from the sky. Other accounts say that if you dropped an anvil it would fall for 9 days and nights before reaching the entrance to the Pit.