In the Age of Legends, there was known to be a weave called the Mirror of Mists. This weave, woven by channelers known as Aes Sedai, created an illusion of anything the channeler wished it to be. The only requirement was you had to believe in what you saw, or else you saw through to reality. If you believe, mortal, enter the illusion, and escape reality to be forever lost in the Mists.