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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 bones1Always361

CharmsEdit

Charm drop numbers
No charmGold charmGreen charmCrimson charmBlue charm
87–88%3%1–2%8%0.5–0.7%
Represents a 90% confidence range.
Based on a sample of 10,258 kills.
1 charm is dropped at a time.
Add data to the log
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Weapons and ArmourEdit

Item Quantity Rarity GE market price
Adamant chainbodyAdamant chainbody1Common2,227
Adamant sq shieldAdamant sq shield1Common1,663
Rune daggerRune dagger1Common4,193
Rune helmRune helm1Common10,617
Rune maceRune mace1Common7,829
Rune longswordRune longsword1Uncommon18,295
Royal capeRoyal cape1Rare619

HerbsEdit

Item Quantity Rarity GE market price
Grimy guamGrimy guam1Uncommon331
Grimy marrentillGrimy marrentill1Uncommon200
Grimy tarrominGrimy tarromin1Uncommon41
Grimy harralanderGrimy harralander1Uncommon117
Grimy ranarrGrimy ranarr1Rare2,664
Grimy iritGrimy irit1Rare2,473
Grimy avantoeGrimy avantoe1Rare4,778
Grimy kwuarmGrimy kwuarm1Rare6,158
Grimy cadantineGrimy cadantine1Very rare6,227
Grimy lantadymeGrimy lantadyme1Very rare6,627
Grimy dwarf weedGrimy dwarf weed1Very rare6,631

SeedsEdit

Item Quantity Rarity GE market price
Fellstalk seed 5Fellstalk seed[1]2Common578
Belladonna seed 5Belladonna seed1Rare250
Cactus seed 5Cactus seed1Rare208
Poison ivy seed 5Poison ivy seed1Rare24
Herb seed 5Toadflax seed1Uncommon1,533
Herb seed 5Irit seed1Rare115
Herb seed 5Avantoe seed1Rare396
Herb seed 5Kwuarm seed1Rare1,637
Herb seed 5Snapdragon seed1Very rare414
Herb seed 5Cadantine seed1Very rare1,466
Herb seed 5Lantadyme seed1Very rare7,023
Herb seed 5Dwarf weed seed1Very rare8,822
Herb seed 5Torstol seed1Very rare3,598
  1. ^ No anagogic ort is dropped along this drop.

Raw MaterialsEdit

Item Quantity Rarity GE market price
FlaxFlax50–100 (noted)Common1,250–2,500
Runite oreRunite ore1Common10,147
Adamantite oreAdamantite ore3 (noted)Common3,942
Royal dragonhideRoyal dragonhide1Uncommon5,286

OtherEdit

    
Item Quantity Rarity GE market price
Coins 1000Coins5,000CommonNot sold
Saradomin brew (2)Saradomin brew (2)1Common7,275
SharkShark2Common1,774
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 sapphire1Common879
Uncut emeraldUncut emerald1Common1,491
Uncut rubyUncut ruby1Common2,509
Uncut diamondUncut diamond1Common4,441
Uncut diamondUncut diamond45–55 (noted)Rare199,845–244,255
Loop half of a keyLoop half of a key1Uncommon17,959
Tooth half of a keyTooth half of a key1Uncommon36,653
Uncut dragonstoneUncut dragonstone1Uncommon13,183
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare593,235–725,065
Dragon longswordDragon longsword1Common57,753
Dragon spearDragon spear1Uncommon34,826
BattlestaffBattlestaff180–220 (noted)Uncommon1,292,940–1,580,260
Rune javelinRune javelin5Rare915
Rune platebodyRune platebody1Uncommon37,925
Rune platebodyRune platebody15–25 (noted)Rare568,875–948,125
Shield left halfShield left half1Uncommon64,431
Dragon helmDragon helm1Uncommon58,789
Rune arrowheads 5Rune arrowheads113–137Common23,165–28,085
Onyx bolts 5Onyx bolts135–165Rare1,126,575–1,376,925
Vecna skullVecna skull1Uncommon40,006
Chaos talismanChaos talisman1Uncommon866
Nature talismanNature talisman1Uncommon515
Water talismanWater talisman65–82 (noted)Rare817,505–1,031,314
Earth talismanEarth talisman65–82 (noted)Rare234,260–295,528
Fire talismanFire talisman25–35 (noted)Rare81,975–114,765
Raw lobsterRaw lobster135–165 (noted)Uncommon26,730–32,670
Raw sharkRaw shark225–275 (noted)Uncommon205,875–251,625
Big bonesBig bones79–90 (noted)Uncommon28,519–32,490
Dragon bonesDragon bones180–220 (noted)Uncommon352,620–430,980
CoalCoal200–1,100 (noted)Uncommon73,000–401,500
Gold oreGold ore90–110 (noted)Common13,590–16,610
Adamantite oreAdamantite ore180–220 (noted)Uncommon236,520–289,080
Adamant barAdamant bar15 (noted)Common46,230
Adamant barAdamant bar135–165 (noted)Rare416,070–508,530
Runite oreRunite ore90–110 (noted)Rare913,230–1,116,170
Rune barRune bar3 (noted)Common42,192
Rune barRune bar45–55 (noted)Rare632,880–773,520
Grimy torstolGrimy torstol90–110 (noted)Uncommon503,820–615,780
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon379,080–463,320
Super restore (4)Super restore (4)45–55 (noted)Uncommon171,720–209,880
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon123,210–150,590
Herb seed 5Lantadyme seed14–16Uncommon98,322–112,368
Herb seed 5Dwarf weed seed14–16Uncommon123,508–141,152
Magic seed 5Magic seed4Uncommon405,408
Palm tree seed 5Palm tree seed10Rare1,505,590
FlaxFlax450–550 (noted)Common11,250–13,750
Molten glassMolten glass45–55 (noted)Common6,705–8,195
Soft claySoft clay450–550 (noted)Uncommon83,250–101,750
Yew logsYew logs68–82Uncommon15,436–18,614
Yew logsYew logs675–825 (noted)Rare153,225–187,275
Teak plankTeak plank45–55 (noted)Uncommon31,725–38,775
Mahogany plankMahogany plank270–330 (noted)Rare606,420–741,180
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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