Within a Nomadic Waaagh! army, any Orc model that is mounted on a War Boar (Black Orc Bosses, Orc Bosses, Orc Shamans and Orc Boar Boyz) gains the Impact Hits (1) special rule. These Impact Hits are made using the Strength characteristic of the War Boar and have an Armour Piercing characteristic of -1. In addition, 0-1 Orc Boar Boyz Mob per 1,000 points may have the Vanguard special rule for +1 point per model.