In addition to its defensive bonuses, it provides a 9% reduction to damage from creatures and players in TzHaar City. With an update on the 30th April 2013, the armour no longer triples damage taken by you when fighting in PvP or any other monster. When on a Slayer task within the TzHaar city it also counts as a black mask, increasing your Melee damage and accuracy by 12.5%. When used with the rest of the obsidian armour, it will increase your Melee accuracy by 10%, very similar to the Void Knight equipment and void melee helm.