Unknown Skaven Clan

Unknown Skaven Clan is a Skaven faction introduced in Total War: Warhammer II.

There are actually four different variations of it (each with a differently colored symbol) for each of the four factions that can perform a Ritual in the Eye of the Vortex campaign.

Once a ritual is begun, armies of an Unknown Skaven Clan may spawn nearby the ritual site, automatically at war with the faction that started the ritual. They may also be joined by Chaos or Norsca armies. They do not appear on the Diplomacy screen.