Coroz

Coroz is a monochromatic dimension that is the true homeworld of the Riftborn. It is a place where these beings would float in harmonious lives of everlasting contemplation, until an interstellar travel accident in Auriga created a permanent rift into their plane. This infected Coroz itself with an unstoppable blight that was lethal to native life, which forced the Riftborn to begin evacuating into the Endless Galaxy for continued survival.

Coroz is implied to have more than three spatial dimensions. Conventional matter can still survive in the physics of Coroz, although it's not known if organic lifeforms can.