Shivering: Forces of Order
The Forces of Order appear at the end of every era in the Shivering Isles, about every 1000 years. The Greymarch, essentially their coming, begins as Jyggalag grows in power. Eventually, Sheogorath leaves the realm to be consumed by Jyggalag and his armies, only to return afterwards and rebuild it piece-by-piece. As the Greymarch progresses, more and more Obelisks become active or rise from the ground, resulting in the Knights becoming more numerous, and culminating when Jyggalag himself arrives. The Forces then proceed to annihilate the realm of the Shivering Isles in the name of order. Other than Jyggalag himself, the Forces of Order consist of only two different enemies, Knights and Priests.