Devices crafted during the Age of Legends that use the One Power to perform specific functions. Unlike angreal and sa'angreal, which amplify channelling ability, each ter'angreal serves a particular purpose. Some require channelling to activate while others work independently. Examples include the Oath Rod used by Aes Sedai, the twisted redstone doorways leading to the Aelfinn and Eelfinn, and the dream ter'angreal that allow entry to Tel'aran'rhiod.