The Sundering: Rise of the Witch King is a mod for Medieval 2: Kingdoms and based around the fantasy world of Game workshop's Warhammer universe during the civil war between the Elves, the mod's campaign opens with the Death of Bel Shanaar in -2751 IC.
Of all the diabolical wonder weapons of the Skaven, none is as notorious as the Screaming Bell. It is from these unholy altars that the Grey Seers preach their plans of total domination in the name of the Great Horned Rat.