OSRS Cave Horror Slayer Task Guide: Strategy & Safespots

Cave horrors are slayer monsters that can be assigned as a Slayer task by Chaeldar, Nieve, and Duradel after level 58 Slayer and completion of the Cabin Fever quest. They are well-known for dropping the Black mask, an essential item for making a Slayer helmet. 

A dwarf multicannon can also be used to speed up kills, although it is not necessary if you do not have one. 

Be sure to bring your light source and Witchwod icon/Slayer helmet, and enjoy the exp/profits.

Cave Horror Variants

There are two variants of the Cave Horror:

Where to find Cave Horrors

There is only one location to complete Cave Horror Slayer tasks:

Mos Le'Harmless Cave:

• Requires completion of the Cabin Fever quest to access Mos Le’Harmless.
• You must bring a light source.
• You must wear a witchwood icon or a Slayer helmet to fight cave horrors at melee distance, otherwise they will use a special attack which always deals damage equal to 10% of the player's base Hitpoints level.
• The cave contains over 50 Cave Horrors, making it efficient for tasks.

Fastest ways to get there:

• Mos Le’Harmless teleport scroll
•   Ectophial → ship from Port Phasmatys
•   Charter ship

Gear and Inventory Setup for Killing Cave Horrors

Melee Gear Setup for Cave Horrors

Head slot: Slayer helm (i)
Neck slot: Amulet of avarice / Amulet of Torture
Cape slot: Infernal Cape / Firecape
Body slot: Torva Platebody / Fighter torso
Leg slot: Torva Platelegs / Obsidian legs
Weapon slot: Ghrazi rapier / Abyssal whip
Shield slot: Avernic defender
Ammo slot: Rada’s blessing
Glove slot: Barrows gloves / Ferocious gloves
Boot slot: Primordial boots / Dragon boots
Ring slot: Berserker ring (i)

Melee Inventory Setup for Cave Horrors

• Food (Sharks or better)
• Super combat potion (4)
• Teleport method (House tab or Mos Le’Harmless scroll)
• Prayer potions (if using overheads)
• High Alchemy runes for loots
• Dwarf Cannon
• Light source

Ranged Gear Setup for Cave Horrors

Head slot: Slayer helm (i)
Neck slot: Necklace of anguish
Cape slot: Ava’s assembler
Body slot: Masori’s Body / Karil’s top
Leg slot: Masori’s Platelegs / Karil’s skirt
Weapon slot: Toxic blowpipe
Ammo slot: Rada’s blessing
Glove slot: Zaryte vambraces / Barrows gloves
Boot slot: Pegasian boots / Snakeskin boots
Ring slot: Archer's ring (i)

Ranged Inventory Setup for Cave Horrors

• Food
• Divine Ranging Potion (4)
• Teleport method
• Prayer potions (if using Protect from Melee)
• Dwarf Cannon
• Light source

Strategy for Killing Cave Horrors

• Cave Horrors are aggressive and relatively weak, making them a good task for AFK or semi-AFK methods.
• Always use a light source, or you will take constant damage from the darkness.
• Use Protect from Melee if you want to avoid all damage entirely.
• The Black mask (1/512 drop rate) is the main item of value.
• Move between clusters of spawns to avoid downtime.

Best Cannon spots for Cave Horrors

Cannonspot 1

In this cannon spot, there are only Cave Horrors, you don't have to worry about spending cannonballs on others.

Cannonspot 2

In this cannon spot, there are more cave horrors than in the first one, but there is a bat that will make you waste time while you kill it.

Safespots for Cave Horrors

There are a few corners in the Mos Le’Harmless cave where you can safespot Cave Horrors using ranged or magic, but it is generally slower than using melee with prayer. Most players do not use safespots due to the aggressive behavior and low damage. Although some people enjoy the experience of playing AFK, they go for the safe spots. There are plenty of safe spots here, for example, this one at the entrance. There are plenty like this one on every corner of the place.

Drops from Cave Horrors

The average Cave horror kill is worth 3,924.2 coins (2025). Cave Horror tasks are generally worth doing due to the value of the Black mask drop and the ease of killing them. It’s a great mid-level task to complete efficiently for profit. Here are the drops from cave horrors.

100% Drops

Weapons and armour

Runes

Herbs

Seeds

Other

Gem drops

Tertiary