The black mask is a unique mask worn in the head slot. The mask has the same stats as a black med helm. It provides a player 16.67%[1] Attack and Strength boost against all monsters on the player's current Slayer task. It requires 20 Strength, 10 Defence, and 40 Combat to equip.
Cave horror - OSRS Wiki
How haven't I gotten a black mask if every cave horror is wearing one? : r/ironscape
Slab - OSRS Wiki, scp 035 wiki
Cave horror, Old School RuneScape Wiki
Black h'ween mask, Old School RuneScape Wiki
Shaman mask, Old School RuneScape Wiki
Virtus mask - OSRS Wiki
Clown mask - OSRS Wiki
According to the OSRS Wiki I'm somewhere between 96 and 99% chance of having gotten a Barrows Unique :) I'm past the point of being disappointed, now I'm just curious how dry I can go : r/ironscape
Mask of Stench, RuneScape Wiki
Black demon mask - OSRS Wiki
