Old School RuneScape Wiki
Killing cave slime
Requirements Cave slime.png

17 Slayer icon.png
50+ Multicombat.png recommended


Light source (Oil lantern or Bullseye lantern recommended)
Some food recommended for lower levels
Spiny or Slayer helmet (optional but wards off Wall beasts)


Lost Tribe recommended





Profit Experience gained
14,700 per hour

36,000 Multicombat.png
12,000 Hitpoints icon.png

Inputs Outputs

2 x Antipoison (420)

1,260 × Swamp tar (15,120)

Lumbridge Swamp Caves map.png

Cave slime in the Lumbridge Swamp Caves always drop between one and six swamp tar, which is currently worth 12 coins each. The easiest way to get to the dungeon is by teleporting to Lumbridge, going into the castle basement with a light source, and enter the swamp caves by the entrance next to Mistag. Head south and west, avoiding wall beasts, until you reach an area with three cave slime. Consult the map to the right for more details. Be careful of gas in the caves, as if you have an open light source (i.e. torch, oil lamp, etc.) the gas will explode dealing high damage and extinguishing your light source. A bullseye lantern or similar is recommended.

Attack the three cave slimes in the area. At a high enough combat level, you can more quickly kill them with Melee. They are level 23 and only have 25 Hitpoints, so oftentimes a single hit is enough to kill them. When all three are dead, pick up the swamp tar and wait for them to respawn (it takes about ten seconds from the first one being killed). The cave slimes do use poison. The cave slime drop an average of three swamp tar per kill, and you can easily kill 360 of them per hour at a medium combat level. Sell the swamp tar on the Grand Exchange when finished.

Due to constantly changing prices on the Grand Exchange, some information in this article may or may not be current.
It is strongly recommended to check the live prices on the Grand Exchange before making large investments in any method.

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