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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 582

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 6,931 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 2,167
Adamant sq shield Adamant sq shield 1 2 Common 1,787
Rune dagger Rune dagger 1 2 Common 4,213
Rune helm Rune helm 1 2 Common 10,755
Rune mace Rune mace 1 2 Common 7,806
Rune longsword Rune longsword 1 2 Common 18,331
Royal cape Royal cape 1 4 Rare 401

HerbsEdit

  Item Quantity Rarity GE market price
Grimy guam Grimy guam 1 3 Uncommon 399
Grimy marrentill Grimy marrentill 1 3 Uncommon 99
Grimy tarromin Grimy tarromin 1 3 Uncommon 31
Grimy harralander Grimy harralander 1 3 Uncommon 84
Grimy ranarr Grimy ranarr 1 4 Rare 2,445
Grimy irit Grimy irit 1 4 Rare 1,594
Grimy avantoe Grimy avantoe 1 4 Rare 3,172
Grimy kwuarm Grimy kwuarm 1 4 Rare 2,675
Grimy cadantine Grimy cadantine 1 5 Very rare 1,634
Grimy lantadyme Grimy lantadyme 1 5 Very rare 6,877
Grimy dwarf weed Grimy dwarf weed 1 5 Very rare 7,353

SeedsEdit

  Item Quantity Rarity GE market price
Fellstalk seed 5 Fellstalk seed [1] 2 2 Common 986
Belladonna seed 5 Belladonna seed 1 4 Rare 82
Cactus seed 5 Cactus seed 1 4 Rare 37
Poison ivy seed 5 Poison ivy seed 1 4 Rare 9
Herb seed 5 Toadflax seed 1 3 Uncommon 964
Herb seed 5 Irit seed 1 4 Rare 178
Herb seed 5 Avantoe seed 1 4 Rare 2,493
Herb seed 5 Kwuarm seed 1 4 Rare 60
Herb seed 5 Snapdragon seed 1 5 Very rare 2,480
Herb seed 5 Cadantine seed 1 5 Very rare 692
Herb seed 5 Lantadyme seed 1 5 Very rare 27,201
Herb seed 5 Dwarf weed seed 1 5 Very rare 34,150
Herb seed 5 Torstol seed 1 5 Very rare 21,263
  1. ^ No anagogic ort is dropped along this drop.

Raw MaterialsEdit

  Item Quantity Rarity GE market price
Flax Flax 50 (noted) 2 Common 4,450
Runite ore Runite ore 1 2 Common 11,082
Adamantite ore Adamantite ore 3 (noted) 2 Common 3,918
Royal dragonhide Royal dragonhide 1 3 Uncommon 5,422

OtherEdit

  Item Quantity Rarity GE market price
Coins 1000 Coins 1,000 – 5,000 2 Common Not sold
Saradomin brew (2) Saradomin brew (2) 1 2 Common 589
Shark Shark 2 2 Common 2,030
Blood rune Blood rune 20 2 Common 9,800
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 1,282
Uncut emerald Uncut emerald 1 2 Common 2,561
Uncut ruby Uncut ruby 1 2 Common 3,027
Uncut diamond Uncut diamond 1 3 Uncommon 5,572
Loop half of a key Loop half of a key 1 3 Uncommon 34,719
Tooth half of a key Tooth half of a key 1 3 Uncommon 34,657
Uncut dragonstone Uncut dragonstone 1 4 Rare 14,477
Dragonstone Dragonstone 1 4 Rare 9,933
Dragon dagger Dragon dagger 1 3 Uncommon 16,483
Rune battleaxe Rune battleaxe 1 4 Rare 24,195
Rune javelin Rune javelin 5 4 Rare 910
Adamant javelin Adamant javelin 20 5 Very rare 1,220
Rune 2h sword Rune 2h sword 1 5 Very rare 37,468
Rune spear Rune spear 1 5 Very rare 11,446
Dragon spear Dragon spear 1 5 Very rare 36,368
Battlestaff Battlestaff 200 (noted) 4 Rare 1,554,000
Rune sq shield Rune sq shield 1 5 Very rare 22,166
Rune kiteshield Rune kiteshield 1 5 Very rare 31,864
Shield left half Shield left half 1 5 Very rare 63,182
Dragon helm Dragon helm 1 5 Very rare 58,770
Adamant bolts 5 Adamant bolts 200 3 Uncommon 13,000
Onyx bolts 5 Onyx bolts 150 4 Rare 1,273,200
Rune arrow 5 Rune arrow 150 4 Rare 22,650
Vecna skull Vecna skull 1 5 Very rare 96,512
Water talisman Water talisman 1 3 Uncommon 10,552
Earth talisman Earth talisman 25–35 (noted) 3 Uncommon 62,475–87,465
Fire talisman Fire talisman 25–35 (noted) 3 Uncommon 62,850–87,990
Chaos talisman Chaos talisman 1 3 Uncommon 713
Nature talisman Nature talisman 1 3 Uncommon 463
Pure essence Pure essence 1,000–1,500 (noted) 3 Uncommon 17,000–25,500
Nature rune Nature rune 60–80 4 Rare 18,420–24,560
Soul rune Soul rune 20 4 Rare 4,200
Law rune Law rune 45 4 Rare 19,080
Death rune Death rune 50 4 Rare 15,050
Blood rune Blood rune 50 4 Rare 24,500
Raw swordfish Raw swordfish 125–250 (noted) 3 Uncommon 59,625–119,250
Raw shark Raw shark 250 (noted) 3 Uncommon 281,000
Big bones Big bones 150–180 (noted) 3 Uncommon 87,300–104,760
Coal Coal 550–700 (noted) 3 Uncommon 133,650–170,100
Adamantite ore Adamantite ore 150–250 (noted) 3 Uncommon 195,900–326,500
Silver ore Silver ore 100 (noted) 4 Rare 9,400
Runite ore Runite ore 100 (noted) 4 Rare 1,108,200
Rune bar Rune bar 1 2 Common 14,132
Rune bar Rune bar 50 (noted) 5 Very rare 706,600
Clean toadflax Clean toadflax 35–45 (noted) 3 Uncommon 119,385–153,495
Clean snapdragon Clean snapdragon 30–35 (noted) 3 Uncommon 108,240–126,280
Clean torstol Clean torstol 16–34 (noted) 3 Uncommon 91,616–194,684
Herb seed 5 Snapdragon seed 1 2 Common 2,480
Herb seed 5 Torstol seed 1 3 Uncommon 21,263
Watermelon seed 5 Watermelon seed 3 3 Uncommon 8,547
Magic seed 5 Magic seed 3–7 4 Rare 522,369–1,218,861
Palm tree seed 5 Palm tree seed 10 4 Rare 1,349,520
Yew logs Yew logs 450–550 (noted) 4 Rare 160,200–195,800
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

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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