A Black mask will boost both Attack and Strength by 15% while fighting monsters that have been assigned by a Slayer Master. They can be obtained by fighting Cave Horrors in a cave on Mos Le’Harmless, or by buying them from other players. When meleeing Cave Horrors, a Witchwood Icon and light source is required. The masks have a number of charges, represented by a number following the item title, (e.g.; black mask(10), black mask(3), ranging from 1-10). When the player still has charges, he or she will sometimes have his or her opponent’s Defence decreased. Each time this effect randomly takes place, the player will lose one charge. When Black masks lose all their charges, they have no number. There is no known way to recharge them at this time. Black masks with no charges retain their Attack and Strength boosts. You can now remove charges from a Black mask with an update that came out 2 November 2010.
A Focus Sight will boost Ranged accuracy and strength by 15% while fighting monsters that have been assigned by a Slayer Master. They can be obtained as drops from Desert Strykewyrms, which require 77 Slayer to kill.
A Hexcrest will boost Magic accuracy and strength by 15% while fighting monsters that have been assigned by a Slayer Master. They can be obtained as drops from Jungle Strykewyrms, which require 73 Slayer to kill. It should be noted that these monsters have the ability to poison players.
The Salve amulet is a reward from the Haunted Mine quest, which boosts Attack and Strength by 15% when fighting any undead monster, such as Aberrant Spectres, Banshees, and Shades. The player can enchant it by defeating Tarn Razorlor and using the book obtained on the amulet. A Salve amulet (e) gives a 20% bonus to Attack and Strength. The bonuses of the amulets do not stack with the effect of a Black mask.
Dragon slayer gloves can be purchased for 200 Fist of Guthix tokens from Reggie (the owner of Fist of Guthix Rewards Shop), giving 15% more Slayer experience and a 10% Attack bonus when worn while slaying dragons as part of an assigned slayer task. These boosts stack with the Black mask and Slayer helm. They will crumble to dust after killing 1,000 assigned dragons while wearing the gloves.
The Slayer helmet gives the same advantages which a black mask gives but also acts as a multi task protection helmet. It is made using a black mask, earmuffs, nose peg, facemask and a spiny helmet on each other. The Slayer helmet gives the protection of all of these items against their specific monsters. This helmet requires you to buy the knowledge to make it for 400 slayer points as well as have 10 defence and 55 crafting. This helmet is very popular amongst high level slayers for its practicality and its ability to still give the 15% bonus in attack and strength whilst fighting monsters you otherwise would need a different helmet for.
The Full Slayer helmet can be made by adding a Hexcrest and Focus Sight to a normal Slayer helmet. This makes maging and ranging tasks much easier.