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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 651

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 2,263
Adamant sq shield Adamant sq shield 1 2 Common 1,784
Rune dagger Rune dagger 1 2 Common 4,295
Rune helm Rune helm 1 2 Common 10,572
Rune mace Rune mace 1 2 Common 7,794
Rune longsword Rune longsword 1 2 Common 18,305
Royal cape Royal cape 1 4 Rare 304

HerbsEdit

  Item Quantity Rarity GE Market Price
Grimy guam Grimy guam 1 3 Uncommon 639
Grimy marrentill Grimy marrentill 1 3 Uncommon 152
Grimy tarromin Grimy tarromin 1 3 Uncommon 44
Grimy harralander Grimy harralander 1 3 Uncommon 148
Grimy ranarr Grimy ranarr 1 4 Rare 3,399
Grimy irit Grimy irit 1 4 Rare 2,581
Grimy avantoe Grimy avantoe 1 4 Rare 4,565
Grimy kwuarm Grimy kwuarm 1 4 Rare 3,460
Grimy cadantine Grimy cadantine 1 5 Very rare 2,417
Grimy lantadyme Grimy lantadyme 1 5 Very rare 9,329
Grimy dwarf weed Grimy dwarf weed 1 5 Very rare 9,348

SeedsEdit

  Item Quantity Rarity GE Market Price
Fellstalk seed 5 Fellstalk seed [1] 2 2 Common 2,078
Belladonna seed 5 Belladonna seed 1 4 Rare 59
Cactus seed 5 Cactus seed 1 4 Rare 35
Poison ivy seed 5 Poison ivy seed 1 4 Rare 8
Herb seed 5 Toadflax seed 1 3 Uncommon 1,494
Herb seed 5 Irit seed 1 4 Rare 235
Herb seed 5 Avantoe seed 1 4 Rare 2,978
Herb seed 5 Kwuarm seed 1 4 Rare 284
Herb seed 5 Snapdragon seed 1 5 Very rare 2,555
Herb seed 5 Cadantine seed 1 5 Very rare 800
Herb seed 5 Lantadyme seed 1 5 Very rare 40,551
Herb seed 5 Dwarf weed seed 1 5 Very rare 44,606
Herb seed 5 Torstol seed 1 5 Very rare 41,717
  1. ^ No anagogic ort is dropped along this drop.

Raw MaterialsEdit

  Item Quantity Rarity GE Market Price
Flax Flax 50 (noted) 2 Common 4,550
Runite ore Runite ore 1 2 Common 10,612
Adamantite ore Adamantite ore 3 (noted) 2 Common 6,480
Royal dragonhide Royal dragonhide 1 3 Uncommon 5,745

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 680
Shark Shark 2 2 Common 2,444
Blood rune Blood rune 20 2 Common 7,300
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 1,323
Uncut emerald Uncut emerald 1 2 Common 2,865
Uncut ruby Uncut ruby 1 2 Common 3,437
Uncut diamond Uncut diamond 1 3 Uncommon 5,788
Loop half of a key Loop half of a key 1 3 Uncommon 30,445
Tooth half of a key Tooth half of a key 1 3 Uncommon 45,120
Uncut dragonstone Uncut dragonstone 1 4 Rare 15,552
Dragonstone Dragonstone 1 4 Rare 10,564
Dragon dagger Dragon dagger 1 3 Uncommon 16,393
Rune battleaxe Rune battleaxe 1 4 Rare 24,197
Rune javelin Rune javelin 5 4 Rare 850
Adamant javelin Adamant javelin 20 5 Very rare 1,260
Rune 2h sword Rune 2h sword 1 5 Very rare 37,492
Rune spear Rune spear 1 5 Very rare 11,458
Dragon spear Dragon spear 1 5 Very rare 36,374
Battlestaff Battlestaff 200 (noted) 4 Rare 1,572,400
Rune sq shield Rune sq shield 1 5 Very rare 22,197
Rune kiteshield Rune kiteshield 1 5 Very rare 31,639
Shield left half Shield left half 1 5 Very rare 64,814
Dragon helm Dragon helm 1 5 Very rare 59,208
Adamant bolts 5 Adamant bolts 200 3 Uncommon 14,200
Onyx bolts 5 Onyx bolts 150 4 Rare 1,267,050
Rune arrow 5 Rune arrow 150 4 Rare 22,650
Vecna skull Vecna skull 1 5 Very rare 101,975
Water talisman Water talisman 1 3 Uncommon 16,616
Earth talisman Earth talisman 25–35 (noted) 3 Uncommon 133,900–187,460
Fire talisman Fire talisman 25–35 (noted) 3 Uncommon 126,900–177,660
Chaos talisman Chaos talisman 1 3 Uncommon 991
Nature talisman Nature talisman 1 3 Uncommon 346
Pure essence Pure essence 1,000–1,500 (noted) 3 Uncommon 15,000–22,500
Nature rune Nature rune 60–80 4 Rare 17,460–23,280
Soul rune Soul rune 20 4 Rare 4,420
Law rune Law rune 45 4 Rare 23,760
Death rune Death rune 50 4 Rare 13,350
Blood rune Blood rune 50 4 Rare 18,250
Raw swordfish Raw swordfish 125–250 (noted) 3 Uncommon 50,250–100,500
Raw shark Raw shark 250 (noted) 3 Uncommon 366,250
Big bones Big bones 150–180 (noted) 3 Uncommon 97,650–117,180
Coal Coal 550–700 (noted) 3 Uncommon 132,000–168,000
Adamantite ore Adamantite ore 150–250 (noted) 3 Uncommon 324,000–540,000
Silver ore Silver ore 100 (noted) 4 Rare 9,000
Runite ore Runite ore 100 (noted) 4 Rare 1,061,200
Rune bar Rune bar 1 2 Common 13,675
Rune bar Rune bar 50 (noted) 5 Very rare 683,750
Clean toadflax Clean toadflax 35–45 (noted) 3 Uncommon 155,505–199,935
Clean snapdragon Clean snapdragon 30–35 (noted) 3 Uncommon 141,060–164,570
Clean torstol Clean torstol 16–34 (noted) 3 Uncommon 142,912–303,688
Herb seed 5 Snapdragon seed 1 2 Common 2,555
Herb seed 5 Torstol seed 1 3 Uncommon 41,717
Watermelon seed 5 Watermelon seed 3 3 Uncommon 7,023
Magic seed 5 Magic seed 3–7 4 Rare 427,980–998,620
Palm tree seed 5 Palm tree seed 10 4 Rare 1,101,940
Yew logs Yew logs 450–550 (noted) 4 Rare 175,500–214,500
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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