Duat

Duat is the realm of the dead in Egyptian mythos. While playing host to many different kinds of spirits and creatures, it was also the home to several god figures such as Osiris, Anubis, Thoth, Horus, Hathor, and Maat. Hathor, being Ihy's primary mother figure, provided him residences in Duat as well. The spirits of Ihy's 72 children reside in Duat between lives spent with Hosts in the mortal realm.

Ihy and his children Hosted on Earth have some sort of persistent link to Duat. Presumably, it pulls back the spirits of the god-children when their Host dies in the mortal realm. Ihy implies that the link is what allows him to use the faces of the dead when appearing to others, and that Izadore abused the ability when comforting Jimmy's parents. The link might be a component of Lucas' unusually advanced ability to channel the void, though Izadore said that the two would need to seek help and training to fully understand that rare aspect of their powers.