The Slayer of Kings ignores armour saves. In addition, Archaon may unleash the power of U'zuhl in any Close Combat phase. If he does this, he fights with double his normal number of Attacks (usually 10) but any rolls to hit of a 1 will strike either himself or a friendly model in base contact (Chaos player's choice). He may not re-roll to hit results of a 1 for any reason when unleashing U'zuhl. Once U'Zuhl is released, Archaon must use this special ability in every close combat he is subsequently involved in - the Daemon cannot be bound back into the blade during the battle.