Thanquol seems to enjoy the favour of the Horned One, always escaping death in the direst situations. To simulate this he has a Ward save of 4+. In addition, when Thanquol is inside a unit, for every wound saved by his Ward save, one Skaven in base contact with the Grey Seer (Skaven player's choice) will be wounded in his place. Resolve the effects of the wound as normal against the unfortunate Skaven, including normal armour saves, etc.