|“||Jyggalag! He is the Prince of Order. Or biscuits...no, order, Order! And not in a good way. Bleak. Colorless. Dead. Boring, boring, BORING!||„|
|~ Sheogorath; Elder Scrolls IV Oblivon, Shivering Isles|
Jyggalag is the main antagonist of The Elder Scrolls IV: The Shivering Isles. He is the Daedric Prince of Order, Logic and Deductive Reasoning, said to have taken into account everything on Mundus that has happened, is happening and will happen.
In days of old, Jyggalag and his Knights of Order ruled over an ever-expanding empire of “perfect” order across the realms of Oblivion. However, the other Daedric Princes came to fear and despise him due to his growing power, and banded together against him. They cursed Jyggalag to live as the very opposite of what he stood for, transforming him into the madman Sheogorath, Daedric Prince of Madness.
Once at the end of every era, Jyggalag would be allowed to become himself again and conquer the Shivering Isles in an event known as the "Greymarch", which was always successful. However, once the Greymarch had passed, Jyggalag would transform back into Sheogorath, who would rebuild his realm, only for the process to start again as the new era came to an end.
During the events of the game, Sheogorath invites the player into his realm to be his champion and stop the upcoming Greymarch, and when the Greymarch does happen the player ultimately fights and defeats Jyggalag. Jyggalag’s spirit then appears and tells the player that by defeating him, they have broken the cycle of the Greymarch and he can now wander Oblivion once again; before departing, he bids the player farewell and declares them to be the new Sheogorath.