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Mature grotworm

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This article is about level 98 Grotworms. For other types of Grotworms, see Grotworm (disambiguation).
This article has a money making guide here
This article has a related strategy guide here.
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Mature grotworms are monsters that can be found on the bottom level of the Grotworm Lair. They have slow, but accurate and hard-hitting magic and melee attacks. However, magic attacks are only used on players outside of melee range, similar to monsters such as metal dragons and cockroach soldiers. It is possible to safespot them using the pillars if you stand far enough back from them. Lower-level players are recommended to bring high healing food such as monkfish or sharks. Ranged/magic would require Protect from Magic/Deflect Magic if using safe spots. The magic attack has a short range, so flashing your prayer when out of its range can help conserve prayer points. Despite their ranged weakness, a player with 70+ melee stats should have little trouble killing them efficiently, even without the use of prayer.

Using high level ranged gear such as Armadyl and using a bunyip will reduce the need for prayer potions/flasks. The occasional Shark drops will reduce the need for food, and ranged gear will mean little damage from the mature grotworms' magic attack while ranging.

If a player tries to set up a cannon within the Grotworm Lair, they will receive a message saying: "The damp air would prevent your cannon operating." This does not prevent hand cannons from working, however.

Some players may find it useful to bring runes to cast High Level Alchemy on the items dropped by the grotworms, as adamant and rune equipment are common drops. The profit of using this spell on some of these items is greater than banking and selling them.

DropsEdit

100% dropEdit

  Item Quantity Rarity GE market price
Big bones Big bones 1 1 Always 544

CharmsEdit

Charm drop percentages
No charms Gold charm Green charm Crimson charm Blue charm

87–88%

2–3%

1–2%

7–8%

0.5–0.8%

Represents 90% confidence range, based on a sample of 6,660 kills.
1 charm is dropped at a time.

Please add to the log (only if 50 or more creatures killed).


Weapons and ArmourEdit

  Item Quantity Rarity GE market price
Adamant chainbody Adamant chainbody 1 2 Common 2,254
Adamant sq shield Adamant sq shield 1 2 Common 1,809
Rune dagger Rune dagger 1 2 Common 4,211
Rune helm Rune helm 1 2 Common 10,624
Rune mace Rune mace 1 2 Common 7,756
Rune longsword Rune longsword 1 2 Common 18,329
Royal cape Royal cape 1 4 Rare 367

HerbsEdit

  Item Quantity Rarity GE market price
Grimy guam Grimy guam 1 3 Uncommon 495
Grimy marrentill Grimy marrentill 1 3 Uncommon 95
Grimy tarromin Grimy tarromin 1 3 Uncommon 37
Grimy harralander Grimy harralander 1 3 Uncommon 134
Grimy ranarr Grimy ranarr 1 4 Rare 3,357
Grimy irit Grimy irit 1 4 Rare 2,943
Grimy avantoe Grimy avantoe 1 4 Rare 4,594
Grimy kwuarm Grimy kwuarm 1 4 Rare 3,790
Grimy cadantine Grimy cadantine 1 5 Very rare 2,405
Grimy lantadyme Grimy lantadyme 1 5 Very rare 8,967
Grimy dwarf weed Grimy dwarf weed 1 5 Very rare 9,042

SeedsEdit

  Item Quantity Rarity GE market price
Fellstalk seed 5 Fellstalk seed [1] 2 2 Common 1,024
Belladonna seed 5 Belladonna seed 1 4 Rare 66
Cactus seed 5 Cactus seed 1 4 Rare 37
Poison ivy seed 5 Poison ivy seed 1 4 Rare 10
Herb seed 5 Toadflax seed 1 3 Uncommon 960
Herb seed 5 Irit seed 1 4 Rare 191
Herb seed 5 Avantoe seed 1 4 Rare 2,595
Herb seed 5 Kwuarm seed 1 4 Rare 126
Herb seed 5 Snapdragon seed 1 5 Very rare 2,335
Herb seed 5 Cadantine seed 1 5 Very rare 747
Herb seed 5 Lantadyme seed 1 5 Very rare 30,994
Herb seed 5 Dwarf weed seed 1 5 Very rare 37,873
Herb seed 5 Torstol seed 1 5 Very rare 26,997
  1. ^ No anagogic ort is dropped along this drop.

Raw MaterialsEdit

  Item Quantity Rarity GE market price
Flax Flax 50 (noted) 2 Common 4,150
Runite ore Runite ore 1 2 Common 10,441
Adamantite ore Adamantite ore 3 (noted) 2 Common 5,262
Royal dragonhide Royal dragonhide 1 3 Uncommon 5,749

OtherEdit

  Item Quantity Rarity GE market price
Coins 1000 Coins 5,000 2 Common Not sold
Saradomin brew (2) Saradomin brew (2) 1 2 Common 660
Shark Shark 2 2 Common 2,256
Blood rune Blood rune 20 2 Common 8,820
Long bone Long bone 1 4 Rare Not sold
Curved bone Curved bone 1 4 Rare Not sold
Clue scroll Clue scroll (hard) 1 4 Rare Not sold
Spirit sapphire Spirit sapphire 1 4 Rare Not sold
Spirit emerald Spirit emerald 1 4 Rare Not sold
Spirit ruby Spirit ruby 1 4 Rare Not sold
Court summons Court summons 1 5 Very rare Not sold
Ancient effigy Starved ancient effigy 1 5 Very rare Not sold

Rare drop table dropsEdit

This monster has access to the rare drop table.
The ring of wealth is not required to access the table.
Show/hide rare drop table
Item Quantity Rarity GE Market Price
Coins 250 Coins 200–350,3,000 2 Common Not sold
Uncut sapphire Uncut sapphire 1 2 Common 1,365
Uncut emerald Uncut emerald 1 2 Common 2,872
Uncut ruby Uncut ruby 1 2 Common 3,404
Uncut diamond Uncut diamond 1 3 Uncommon 5,655
Loop half of a key Loop half of a key 1 3 Uncommon 30,596
Tooth half of a key Tooth half of a key 1 3 Uncommon 36,191
Uncut dragonstone Uncut dragonstone 1 4 Rare 14,893
Dragonstone Dragonstone 1 4 Rare 10,151
Dragon dagger Dragon dagger 1 3 Uncommon 16,150
Rune battleaxe Rune battleaxe 1 4 Rare 24,244
Rune javelin Rune javelin 5 4 Rare 885
Adamant javelin Adamant javelin 20 5 Very rare 1,240
Rune 2h sword Rune 2h sword 1 5 Very rare 37,376
Rune spear Rune spear 1 5 Very rare 11,148
Dragon spear Dragon spear 1 5 Very rare 36,181
Battlestaff Battlestaff 200 (noted) 4 Rare 1,456,000
Rune sq shield Rune sq shield 1 5 Very rare 22,401
Rune kiteshield Rune kiteshield 1 5 Very rare 31,624
Shield left half Shield left half 1 5 Very rare 64,211
Dragon helm Dragon helm 1 5 Very rare 58,935
Adamant bolts 5 Adamant bolts 200 3 Uncommon 12,400
Onyx bolts 5 Onyx bolts 150 4 Rare 1,276,950
Rune arrow 5 Rune arrow 150 4 Rare 22,650
Vecna skull Vecna skull 1 5 Very rare 111,748
Water talisman Water talisman 1 3 Uncommon 16,593
Earth talisman Earth talisman 25–35 (noted) 3 Uncommon 145,850–204,190
Fire talisman Fire talisman 25–35 (noted) 3 Uncommon 142,825–199,955
Chaos talisman Chaos talisman 1 3 Uncommon 809
Nature talisman Nature talisman 1 3 Uncommon 514
Pure essence Pure essence 1,000–1,500 (noted) 3 Uncommon 16,000–24,000
Nature rune Nature rune 60–80 4 Rare 17,400–23,200
Soul rune Soul rune 20 4 Rare 3,840
Law rune Law rune 45 4 Rare 17,595
Death rune Death rune 50 4 Rare 11,100
Blood rune Blood rune 50 4 Rare 22,050
Raw swordfish Raw swordfish 125–250 (noted) 3 Uncommon 56,750–113,500
Raw shark Raw shark 250 (noted) 3 Uncommon 352,000
Big bones Big bones 150–180 (noted) 3 Uncommon 81,600–97,920
Coal Coal 550–700 (noted) 3 Uncommon 139,150–177,100
Adamantite ore Adamantite ore 150–250 (noted) 3 Uncommon 263,100–438,500
Silver ore Silver ore 100 (noted) 4 Rare 8,700
Runite ore Runite ore 100 (noted) 4 Rare 1,044,100
Rune bar Rune bar 1 2 Common 14,355
Rune bar Rune bar 50 (noted) 5 Very rare 717,750
Clean toadflax Clean toadflax 35–45 (noted) 3 Uncommon 152,880–196,560
Clean snapdragon Clean snapdragon 30–35 (noted) 3 Uncommon 156,600–182,700
Clean torstol Clean torstol 16–34 (noted) 3 Uncommon 125,552–266,798
Herb seed 5 Snapdragon seed 1 2 Common 2,335
Herb seed 5 Torstol seed 1 3 Uncommon 26,997
Watermelon seed 5 Watermelon seed 3 3 Uncommon 5,550
Magic seed 5 Magic seed 3–7 4 Rare 416,295–971,355
Palm tree seed 5 Palm tree seed 10 4 Rare 1,234,780
Yew logs Yew logs 450–550 (noted) 4 Rare 164,700–201,300
Crystal triskelion fragment 1 Crystal triskelion fragment 1 1 5 Very rare Not sold
Crystal triskelion fragment 2 Crystal triskelion fragment 2 1 5 Very rare Not sold
Crystal triskelion fragment 3 Crystal triskelion fragment 3 1 5 Very rare Not sold
Brawling gloves (Melee) Brawling gloves (Melee) 1 5 Very rare Not sold
Brawling gloves (Magic) Brawling gloves (Magic) 1 5 Very rare Not sold
Brawling gloves (Ranged) Brawling gloves (Ranged) 1 5 Very rare Not sold
Brawling gloves (Agility) Brawling gloves (Agility) 1 5 Very rare Not sold
Brawling gloves (Cooking) Brawling gloves (Cooking) 1 5 Very rare Not sold
Brawling gloves (FM) Brawling gloves (FM) 1 5 Very rare Not sold
Brawling gloves (Fishing) Brawling gloves (Fishing) 1 5 Very rare Not sold
Brawling gloves (Hunter) Brawling gloves (Hunter) 1 5 Very rare Not sold
Brawling gloves (Mining) Brawling gloves (Mining) 1 5 Very rare Not sold
Brawling gloves (Prayer) Brawling gloves (Prayer) 1 5 Very rare Not sold
Brawling gloves (Smithing) Brawling gloves (Smithing) 1 5 Very rare Not sold
Brawling gloves (Thieving) Brawling gloves (Thieving) 1 5 Very rare Not sold
Brawling gloves (WC) Brawling gloves (WC) 1 5 Very rare Not sold

Universal dropsEdit

Universal drops are dropped by nearly every monster outside of Daemonheim.
These drops are dropped alongside main drops.
  Item Quantity Rarity GE market price
Key token Key token 1 4 Rare Not sold
Ghostweave Ghostweave 10–30 4 Rare Not sold

TriviaEdit

  • When these creatures were first released, they did not drop items from the rare drop table, but did after the Queen Black Dragon update.
  • The word 'grotworm' means caveworm in Dutch.
  • Their examine text hints towards the possibility of the existence of a stronger grotworm based creature, although likely not an actual worm as "metamorphosis" implies, but none were released with them.
  • On 17 June 2013, these monsters received a massive power increase. Their lifepoints more than tripled, their accuracy was increased greatly, and their damage output was made substantially higher. This considerably decreased the amount of botting and people in general coming to the grotworms for money. They were level 120 with 3000 lifepoints before this update.
  • On the same 17 June 2013 update, the slayer experience rewarded increased from 73 to 360.5, to compensate for their increased strength.
  • Due to excessive botting, an update on 7 August 2012 removed several rune armour drops from the drop table of mature grotworms, replacing them with their adamant counterparts, making it less effective to earn money. The same update also removed royal bolts and super restore potions from their drop tables.

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