Killing mature grotworms

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Killing mature grotworms
RequirementsKilling mature grotworms.png
Skills

80 Magic or Ranged or Attack recommended (along with Defence)
55 Magic (for High Level Alchemy)
50 Agility recommended

Items
Tier 70+ ranged weapon and armour
Nature rune.png: RS3 Inventory image of Nature runeNature runes
Fire rune.png: RS3 Inventory image of Fire runeFire runes
Quest
Song from the Depths recommended
Other
None
Results
ProfitExperience gained
523,465

120,000 Combat
33,000 Constitution
40,000 Magic

Inputs (61,600)Outputs (585,065)
70 x Nature rune.png: RS3 Inventory image of Nature runeNature rune (31,500)
350 x Fire rune.png: RS3 Inventory image of Fire runeFire rune (30,100)
7 x Runite stone spirit.png: RS3 Inventory image of Runite stone spiritRunite stone spirit (3,402)
20 x Saradomin brew (2).png: RS3 Inventory image of Saradomin brew (2)Saradomin brew (2) (77,260)
16 x Adamantite stone spirit.png: RS3 Inventory image of Adamantite stone spiritAdamantite stone spirit (848)
5 x Royal dragonhide.png: RS3 Inventory image of Royal dragonhideRoyal dragonhide (23,555)
480,000 x Coins.png: RS3 Inventory image of CoinsCoins (480,000) (High alchemy)

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. 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.