Twilight Cultist Ring of Lordship

A Twilight Cultist Ring of Lordship was only given to high ranking members of the Twilight Council, to allow them communication with the Abyssal Lords.

Source
This item can be obtained as a drop from Twilight Lord Everun in Silithus, and from the following quests:
 * Lords of the Council
 * Twilight Ring of Lordship