Greymarch

The Greymarch is an event that happens at the end of every era in the Shivering Isles, it's intended to destroy the Oblivion Realm so that Sheogorath must rebuild it. Greymarch begins with large obelisks emerging from the ground. These obelisks are the source of power Jyggalags forces, the Knights of Order and the Priests of Order.