The Wyrm of Elynglenn is a legendary serpent that lives in the elven ruins of Elenglynn, located in the Great Forest of Cyrodiil. The Wyrm was defeated by Sir Amiel Lannus and his group of the Knights of the Nine when they retrieved the Cuirass of the Crusader. Sir Amiel's victory over the wyrm led to the early fame of the Knights, ever since their time in the War of the Isle. Afterward, the Knights established their base of operations in the West Weald, the Priory of the Nine.
- The Elder Scrolls IV: Knights of the Nine (mentioned only)