Knight of Order

From the OblivioWiki – your guide to everything Oblivion

Knights of Order are unique daedra who serve the Daedric Prince Jyggalag in the Oblivion expansion the Shivering Isles. They are continuously spawned by Obelisks in the Shivering Isles by the mortal followers of Jyggalag know as Priests of Order. Unlike all other daedra in the game, they drop Hearts of Order rather than Daedra Hearts. These Hearts can be used with Obelisks to shut them down. Be warned, with every Heart inserted into an Obelisk, a Knight will spawn. They are humanoid in shape, seemingly slightly taller than most humanoids, wear crystal armor and wield crystalline swords, which they seem to wield with great skill. According to Sheogorath and Haskill, the Knights, much like their Prince, do not have a single original thought in their heads, making them perfect soldiers of Order.