Irythia

Roughly what a drawing in Bastos's workshop looked like

According to Glory, Irythia (ih-RIH-thee-uh) is a blessed realm where he, Bastos, Colwyn, the Valens, the Akallan gods, and the Phoenic gods (the latter three being the same) are all from. Based on this description, it may be that Irythia is the same realm as Celestia.