The Citadel of Trials, also known as Castle of Ordeals, is a location in the original Final Fantasy composed of many small rooms with one or more teleport tiles. Only one teleporter in each room will bring the player to the next room, while the others will return the player to a previous room. The process of trial and error means several attempts will have to be made to reach the final room and retrieve the Rat's Tail, but the easy enemies here should not make the process difficult.