Killing mature grotworms

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Killing mature grotworms
RequirementsKilling mature grotworms.png
Tier 70+ ranged weapon and armour
ProfitROIExperience gained
118,980 Combat
39,258 Constitution
2,925 Magic
Inputs (50,535)Outputs (549,989)
ItemQuantityGE Price
Nature rune.pngNature rune4524,210
Fire rune.pngFire rune22526,325
ItemQuantityGE Price
Runite stone spirit.pngRunite stone spirit12.6621,668
Saradomin brew (2).pngSaradomin brew (2)7.0329,932
Royal dragonhide.pngRoyal dragonhide5.6313,584

The profit rate assumes 180 kills per hour. Your actual profit may be higher or lower depending on your speed.

Mature grotworms are found in the bottom level of the Grotworm Lair, which can be accessed by either a long trek through the cave, or a shortcut requiring 50 Agility. Alternatively, players can teleport directly to the grotworms using Remora's necklace teleport after completing Song from the Depths. The grotworms are level 98 and have 10500 life points, so they are much harder to kill than they used to be. They are weak to bolts so it may be worth it to use Ranged against them, but a Magic weapon above level 70 (such as a Staff of light or Polypore staff) is also fairly effective. Consider using Soul Split or a bunyip, but the grotworms also drop two un-noted sharks commonly.

Mature grotworms drop adamant and rune very often. It's best to use High Level Alchemy on these drops to avoid banking too often. Alternatively, players can bring a spring cleaner. They also drop royal dragonhide and varying herbs and seeds uncommonly. If you pick up all these items, you'll generally have to bank about once per hour.

  1. ^ Gained from casting High Level Alchemy on salvage drops