Mythic Odysseys of Theros
Theros possesses a unique metaphysical property: things believed and dreamed here eventually become real. The collective unconscious of mortal people has the literal power of creation, though the process unfolds over the course of countless centuries. Thus, the gods of Theros and their servants were believed, dreamed, and narrated into existence, materializing and becoming fully real as a result of mortal belief in their power. As stories were told, sacrifices made, and devotion given overages, the gods formed and gained lives just as real as the mortals who dreamed them into being. Does that mean that the gods of Theros are less powerful or less divine than the gods of other worlds? Not at all. Once a dream or belief in Theros becomes reality, it is just as real as any other thing, and the gods have been real for a very long time. The people of Theros believe them to be divine, ageless, and all-powerful, and therefore they are.