Valenth

Aetherholes form in places with high amounts of mirajin energy. As time progresses, several aetherholes may form a large cluster, simoulteneously eating away at the fabrics of reality and spewing huge amounts of mirajin from the Reverie into Valenth.

The final result of this process is a pocket of dreamspace-- the ultimate transformation of a piece of Valenth into an area of waking dream.

Dreamspace reality functions much like the Reverie itself on a much smaller scale. Within it, the subconscious mind affects physicality and surroundings. This makes dreamspace exceptionally dangerous for creatures who don't understand it; simpy wandering into a pocket and thinking the wrong things can change a person permanently or even prove fatal.

The Cathedral of a Thousand Roses in Laps-du-Ment is rumored to contain the largest pocket of dreamspace on Valenth, actually existing in the waking world and the Reverie at the same time.