"Dreamland Effect"

Firstly, Dreamland. Dreamland is a new effect where they are in a new copy of the world (in black and white, spawn based on position, so, same coordinates.), what other players will see is a sleeping version of your character. This will make it so you can bring items from the awake world to the dream world. And, if you bring a potion of dreamland II, (this will only work in dreamland) it will say "unable to use" in the overworld, but in dreamland, a potion of dreamland II will take you to a separate dreamland where everything is IC (Invert Colors). The dreamlands will look like your world before you did anything.

The dreamland potion will be brewed with something hard to get. (Developers should decide)