Killing mature grotworms
80 or or recommended (along with )
|Tier 70+ ranged weapon and armour|
|Song from the Depths recommended|
|Inputs (75,530)||Outputs (746,831)|
70 × Nature rune (26,180)
350 × Fire rune (49,350)
7 × Runite stone spirit (3,955)
20 × Saradomin brew (2) (236,000)
16 × Adamantite stone spirit (656)
5 × Royal dragonhide (26,220)
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.