First appears in: The Absent Memory
Sya is categorized in ancient elven history as one of the seven Prime Planets. Alongside Valar, Mar, Eryn, Y’abel, Ayel, and Ashi, it is one of the otso worlds where the ancient elves constructed the massive Defense Mechanism (Thangail Gaud) meant to combat the Fall. During the Great Sending twenty thousand years ago, expeditions of elves were gated to Sya to locate and unlock its piece of the celestial machine.