Killing mature grotworms
Requirements Killing mature grotworms

80 Magic or Ranged or Attack recommended
55 Magic for High Level Alchemy
80 Defence recommended
50 Agility recommended


Combat armour (level 70 or higher recommended)
Weapon (level 80 or higher recommended)


Song from the Depths recommended



Profit Experience gained
613,900 per hour

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

Inputs Outputs

70 x Nature rune Nature runes (28350)
350 x Fire rune Fire runes (55650)

7 x Runite ore Runite ore (9,933)
20 x Saradomin brew (2) Saradomin brew (2) (182,720)
16 x Adamantite ore Adamantite ore (3,632)
5 x Royal dragonhide Royal dragonhide (21,660)
480,000 Coins 10000 Coins (High Level 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. 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 rune longswords, rune helms, rune daggers and rune maces very often. It's best to use High Level Alchemy on these drops to avoid banking too often. They also drop runite ore, royal dragonhide and noted adamantite ore. If you pick up all these items, you'll generally have to bank about once per hour.

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