Mos Le'Harmless Cave
Killing Cave Horrors
A straightforward Slayer creature method built around witchwood protection and the valuable black mask drop.

Killing Cave Horrors
Mos Le'Harmless Cave
Overview and location
Access, encounter type and stat targets
Money maker
- 58 Slayer
- Cabin Fever
- Witchwood icon
- 70+ melee or Ranged
- Fast Mos Le'Harmless travel
- Alchemy runes
Requirements
Access and practical preparation
Required to damage cave horrors.
Complete the quest to access Mos Le'Harmless.
Wear the icon to reduce the cave horror scream effect.
Core mechanics
What controls the encounter
Witchwood protection
Keep the icon equipped while fighting.
Safe spot option
Ranged methods can reduce food use with correct positioning.
Banking
Use a repeatable route rather than stretching an inefficient trip.
Gear progression
Method-specific setups and tradeoffs
Recommended inventory
Method-specific supplies and trip planning
Strategy
A practical step-by-step plan
Equip the witchwood icon
Keep the necklace-slot icon equipped for every kill so the cave horror scream does not cause extreme stat reduction.
Choose melee or Ranged
Use the melee setup for faster direct kills or establish a Ranged safe spot to reduce food use.
Use the Mos Le'Harmless route
Complete Cabin Fever, bring the travel item and keep enough inventory space for herbs, seeds and black mask rolls.
Bank by supplies and storage
Herb and gem storage can extend the trip, but the witchwood icon must stay equipped after every equipment check.
Profitability and projections
The Wiki Estimate seeds loot and supply fields from current market inputs when available. Every assumption remains editable and your saved values take priority.
The calculator will update if the selected Wiki method provides a usable average loot value. You can enter your own value at any time.
Important drops
Notable rewards and drop categories
When the Wiki publishes a matching money-making method, its estimated average loot per kill is available in the editable calculator. Otherwise, enter your own verified sample.
What should I upgrade next?
Method-specific progression priorities
Dragon scimitar -> abyssal whip
This is the direct one-handed melee damage step while the witchwood icon stays in the necklace slot.
Rune crossbow -> toxic blowpipe
Use this separate Ranged path when safe-spotting rather than mixing its armour into the melee setup.
Add herb sack and gem bag
Storage unlocks extend trips without displacing the mandatory witchwood icon.
Common mistakes
Avoidable causes of failed or inefficient trips
Ignoring witchwood protection
Losing position during safe spot option
Mishandling banking: Use a repeatable route rather than stretching an inefficient trip.
Guide status and data source
Guide facts have been researched against reliable game and Wiki information. The Wiki Estimate uses current market inputs when available, while the calculator remains controlled by the player.
Mlux test: Not published