Exor

Exor is a scrap world. Inhabiting it are unwanted or forgotten hopes, dreams and wishes that never came true. All the dreams are completely physical, roaming the infinite landscape, which is, strangely, a vast plain composed of glowing blue cubes, each not unlike the Tesseract in both pallor and shape. The lord of this world, Nebulos, appears before travelers, emerging out of the cubes, composed of them to start with, and then becomes horrifically real.