The Rainbow is a feature that allows users to send copper aethers through it. Aethers may bring back trinkets, light bottles and equippables, but also change in various ways. A Rainbow Sprite is required to access the Rainbow.
Items from the Rainbow Edit
Light Bottles are used in the Nursery to create aethers.
Equippables from the Rainbow Edit
Aether Changes Edit
Aethers that are sent through the Rainbow may change gender, pose (?), turn into a mercury colour or very rarely become a CS breed (?).