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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).
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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 bonesBig bones1Always397

CharmsEdit

Charm drop numbers
No charmGold charmGreen charmCrimson charmBlue charm
86–88%2–3%1–2%8–9%0.5–0.7%
Represents a 90% confidence range.
Based on a sample of 9,437 kills.
1 charm is dropped at a time.
Please add to the log.
(Only if 50 or more creatures are killed)

Weapons and ArmourEdit

Item Quantity Rarity GE market price
Adamant chainbodyAdamant chainbody1Common2,290
Adamant sq shieldAdamant sq shield1Common1,822
Rune daggerRune dagger1Common4,298
Rune helmRune helm1Common10,892
Rune maceRune mace1Common7,975
Rune longswordRune longsword1Common18,374
Royal capeRoyal cape1Rare345

HerbsEdit

Item Quantity Rarity GE market price
Grimy guamGrimy guam1Uncommon338
Grimy marrentillGrimy marrentill1Uncommon164
Grimy tarrominGrimy tarromin1Uncommon35
Grimy harralanderGrimy harralander1Uncommon82
Grimy ranarrGrimy ranarr1Rare2,381
Grimy iritGrimy irit1Rare2,031
Grimy avantoeGrimy avantoe1Rare4,026
Grimy kwuarmGrimy kwuarm1Rare4,663
Grimy cadantineGrimy cadantine1Very rare3,451
Grimy lantadymeGrimy lantadyme1Very rare6,173
Grimy dwarf weedGrimy dwarf weed1Very rare6,594

SeedsEdit

Item Quantity Rarity GE market price
Fellstalk seed 5Fellstalk seed [1]2Common502
Belladonna seed 5Belladonna seed1Rare120
Cactus seed 5Cactus seed1Rare118
Poison ivy seed 5Poison ivy seed1Rare14
Herb seed 5Toadflax seed1Uncommon1,470
Herb seed 5Irit seed1Rare81
Herb seed 5Avantoe seed1Rare335
Herb seed 5Kwuarm seed1Rare648
Herb seed 5Snapdragon seed1Very rare421
Herb seed 5Cadantine seed1Very rare456
Herb seed 5Lantadyme seed1Very rare9,522
Herb seed 5Dwarf weed seed1Very rare13,151
Herb seed 5Torstol seed1Very rare8,393
  1. ^ No anagogic ort is dropped along this drop.

Raw MaterialsEdit

Item Quantity Rarity GE market price
FlaxFlax50–100 (noted)Common1,450–2,900
Runite oreRunite ore1Common10,600
Adamantite oreAdamantite ore3 (noted)Common4,074
Royal dragonhideRoyal dragonhide1Uncommon4,680

OtherEdit

    
Item Quantity Rarity GE market price
Coins 1000Coins5,000CommonNot sold
Saradomin brew (2)Saradomin brew (2)1Common4,600
SharkShark2Common1,418
Blood runeBlood rune20Common9,400
Long boneLong bone1RareNot sold
Curved boneCurved bone1RareNot sold
Clue scroll (hard)Clue scroll (hard)1RareNot sold
Spirit sapphireSpirit sapphire1RareNot sold
Spirit emeraldSpirit emerald1RareNot sold
Spirit rubySpirit ruby1RareNot sold
Court summonsCourt summons1Very rareNot sold
Starved ancient effigyStarved ancient effigy1Very rareNot 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 1000Coins250–500; 3,000CommonNot sold
Uncut sapphireUncut sapphire1Common737
Uncut emeraldUncut emerald1Common1,357
Uncut rubyUncut ruby1Common2,254
Uncut diamondUncut diamond1Common4,020
Uncut diamondUncut diamond45–55 (noted)Rare180,900–221,100
Loop half of a keyLoop half of a key1Uncommon18,041
Tooth half of a keyTooth half of a key1Uncommon36,182
Uncut dragonstoneUncut dragonstone1Uncommon12,618
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare567,810–693,990
Dragon longswordDragon longsword1Common58,283
Dragon spearDragon spear1Uncommon36,306
BattlestaffBattlestaff180–220 (noted)Uncommon1,294,380–1,582,020
Rune javelinRune javelin5Rare920
Rune platebodyRune platebody1Uncommon38,204
Rune platebodyRune platebody15–25 (noted)Rare573,060–955,100
Shield left halfShield left half1Uncommon64,438
Dragon helmDragon helm1Uncommon59,148
Rune arrowheads 5Rune arrowheads113–137Common24,069–29,181
Onyx bolts 5Onyx bolts135–165Rare1,150,470–1,406,130
Vecna skullVecna skull1Uncommon39,787
Chaos talismanChaos talisman1Uncommon897
Nature talismanNature talisman1Uncommon207
Water talismanWater talisman65–82 (noted)Rare756,665–954,562
Earth talismanEarth talisman65–82 (noted)Rare187,525–236,570
Fire talismanFire talisman25–35 (noted)Rare71,150–99,610
Raw lobsterRaw lobster135–165 (noted)Uncommon24,975–30,525
Raw sharkRaw shark225–275 (noted)Uncommon185,850–227,150
Big bonesBig bones80–90 (noted)Uncommon31,760–35,730
Dragon bonesDragon bones180–220 (noted)Uncommon361,980–442,420
CoalCoal200–1,100 (noted)Uncommon69,400–381,700
Gold oreGold ore90–110 (noted)Common16,110–19,690
Adamantite oreAdamantite ore180–220 (noted)Uncommon244,440–298,760
Adamant barAdamant bar15 (noted)Common41,775
Adamant barAdamant bar135–165 (noted)Rare375,975–459,525
Runite oreRunite ore90–110 (noted)Rare954,000–1,166,000
Rune barRune bar3 (noted)Common42,693
Rune barRune bar45–55 (noted)Rare640,395–782,705
Grimy torstolGrimy torstol90–110 (noted)Uncommon447,660–547,140
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon316,170–386,430
Super restore (4)Super restore (4)45–55 (noted)Uncommon139,455–170,445
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon117,675–143,825
Herb seed 5Lantadyme seed14–16Uncommon133,308–152,352
Herb seed 5Dwarf weed seed14–16Uncommon184,114–210,416
Magic seed 5Magic seed4Uncommon575,172
Palm tree seed 5Palm tree seed10Rare1,511,040
FlaxFlax450–550 (noted)Common13,050–15,950
Molten glassMolten glass45–55 (noted)Common6,300–7,700
Soft claySoft clay450–550 (noted)Uncommon97,200–118,800
Yew logsYew logs68–82Uncommon18,768–22,632
Yew logsYew logs675–825 (noted)Rare186,300–227,700
Teak plankTeak plank45–55 (noted)Uncommon33,570–41,030
Mahogany plankMahogany plank270–330 (noted)Rare591,570–723,030
Brawling gloves (Melee)Brawling gloves (Melee)1RareNot sold
Brawling gloves (Magic)Brawling gloves (Magic)1RareNot sold
Brawling gloves (Ranged)Brawling gloves (Ranged)1RareNot sold
Brawling gloves (Agility)Brawling gloves (Agility)1RareNot sold
Brawling gloves (Cooking)Brawling gloves (Cooking)1RareNot sold
Brawling gloves (FM)Brawling gloves (FM)1RareNot sold
Brawling gloves (Fishing)Brawling gloves (Fishing)1RareNot sold
Brawling gloves (Hunter)Brawling gloves (Hunter)1RareNot sold
Brawling gloves (Mining)Brawling gloves (Mining)1RareNot sold
Brawling gloves (Prayer)Brawling gloves (Prayer)1RareNot sold
Brawling gloves (Smithing)Brawling gloves (Smithing)1RareNot sold
Brawling gloves (Thieving)Brawling gloves (Thieving)1RareNot sold
Brawling gloves (WC)Brawling gloves (WC)1RareNot sold
Crystal triskelion fragment 1Crystal triskelion fragment 11Very rareNot sold
Crystal triskelion fragment 2Crystal triskelion fragment 21Very rareNot sold
Crystal triskelion fragment 3Crystal triskelion fragment 31Very rareNot 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 tokenKey token1RareNot 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 life points 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 life points 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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