Archaon may unleash the power of U'zubl in any Close Combat phase. If he does this, he fights wlth 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'zubl. Once U'zubl is released, Archaon must use this special ability in every close combat he is subsequently in - the Daemon cannot be bound back into the blade during the course of the battle. In addition, whether U'zubl has been released or not, the Slayer of Kings ignores armour saves.