The Signet of the Worm is a ring in The Elder Scrolls Online obtained from the Prophet after completing the quest "Castle of the Worm." The Signet is one of many worn by senior cultists of the Order of the Black Worm and is stained with "necromantic fluids."
The Vestige must travel to the Castle of the Worm in Coldharbour to rescue Abnur Tharn who knows the location of Sai Sahan. The Signet is awarded to the Vestige by the Prophet after completing the quest.
- The Signet of the Worm binds on equip, meaning that it cannot be mailed, traded with or sold to other players once equipped. It can still be transferred between characters via banking.