Notes: You must have at least 10 defence, 20 strength, AND 40 combat to equip a black mask. Once you wear a black mask it raises your strength and attack by 15% during slayer tasks. A black mask has (10) charges which lowers your opponents Defence. The charges can also be removed by left-clicking and selecting "Remove charges", it will remove all 10 charges when used. It will activate randomly. Once your 10 charges are up you do not have to buy another one, as the 15% still works at (0). A black mask will work in conjunction with prayer bonuses.

Black mask bonuses do not stack with bonuses from salve amulets. A black mask is used to make a slayer helmet.