Gehenna

The home realm of Eepiy any many other yugoloths. In Episode 7, Eepiy described it as containing an endless field of timelines in which physical reality couldn't hold together and the mountains which visitors associate with it crumble and burn completely. She described its position between Law and neutrality as reflecting the imperfection which dooms all things, as opposed to the empire-building ways of Old Hell and Acheron. She presented her own kind as nature spirits of this plane, able to see the cracks in people's souls and the possibilities of ruin anywhere they look, and driven towards more particular agendas before the Apocalypse by the gods. After the Silence of the Gods, the relation between the motives and themes of the plane and the yugoloths became a back-and-forth feedback they could shape. Experts would also know that while yugoloths are not the promoted ghosts of the dead as they are in D&D sourcebooks, they do contain fragments of many ghosts; memories, emotions, et cetera which could have originated anywhere. Joint efforts between certain groups of arcanaloths studying and adapting their personal expression of evil and a cult of angels from the Five Remaining Heavens doing the same with their understanding of the greater good formed the Way of The True Apocalypse, with Eepiy becoming a nun of this order upon her return, giving up her role as a spirit of warfare and weapons.