Eris

Eris is one of the 18 Faces of Ta, and is found on Tablet 2 of the Dennison Tablets.

Eris in the Third Cycle: is a Desert Wyrm. She is the steed of Ursula in the Kymirran Mounted Cavalry. Eris was tamed by Ursula, when Ursula was a young girl. They have a unique, almost psychic bond. Eris is capable of extremely high speeds across sand, and is capable of burrowing deep sturdy tunnels very quickly.

Text from Dennison Tablet 2: Ursula’s Desert Wyrm and mount. Fierce and loyal in battle, and impossibly fast on sand.