Spook Plane 7 is located in Celestial space, outside of the mortal planes. It is accessible through certain portals.
Spook Plane 7 is the highest of 7 Spook Planes, meant to house the "spookiest" of Spooky Bois. Spook Plane 7 resembles a strange, bleak, dark forest, where some laws of physics and nature don't exist. No animals populate it, only Spooky Bois.