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Black mask (10)
Dropped on 1 slayer drop table · wiki page
| Monster | Table | Qty | Rate | Chance per avg task | Assigned by |
|---|---|---|---|---|---|
| Cave horror | Weapons and armour | 1 | 1/512 | 17.8% | Chaeldar 70–130 Nieve 120–180 Duradel 130–200 Mortimer 80–120 |
Rates from the OSRS Wiki drop tables (Drop Rate Project). "Chance per avg task" uses the midpoint task size of the highest master that assigns the monster.