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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 bones1Always367

CharmsEdit

Charm drop numbers
No charmGold charmGreen charmCrimson charmBlue charm
87–88%3%1–2%8–9%0.4–0.7%
Represents a 90% confidence range.
Based on a sample of 10,035 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 chainbody1Common1,996
Adamant sq shieldAdamant sq shield1Common1,364
Rune daggerRune dagger1Common3,931
Rune helmRune helm1Common10,575
Rune maceRune mace1Common7,761
Rune longswordRune longsword1Uncommon18,329
Royal capeRoyal cape1Rare485

HerbsEdit

Item Quantity Rarity GE market price
Grimy guamGrimy guam1Uncommon296
Grimy marrentillGrimy marrentill1Uncommon137
Grimy tarrominGrimy tarromin1Uncommon37
Grimy harralanderGrimy harralander1Uncommon100
Grimy ranarrGrimy ranarr1Rare2,389
Grimy iritGrimy irit1Rare2,031
Grimy avantoeGrimy avantoe1Rare3,966
Grimy kwuarmGrimy kwuarm1Rare5,345
Grimy cadantineGrimy cadantine1Very rare4,190
Grimy lantadymeGrimy lantadyme1Very rare5,917
Grimy dwarf weedGrimy dwarf weed1Very rare6,452

SeedsEdit

Item Quantity Rarity GE market price
Fellstalk seed 5Fellstalk seed[1]2Common590
Belladonna seed 5Belladonna seed1Rare165
Cactus seed 5Cactus seed1Rare136
Poison ivy seed 5Poison ivy seed1Rare21
Herb seed 5Toadflax seed1Uncommon1,870
Herb seed 5Irit seed1Rare95
Herb seed 5Avantoe seed1Rare433
Herb seed 5Kwuarm seed1Rare1,222
Herb seed 5Snapdragon seed1Very rare411
Herb seed 5Cadantine seed1Very rare472
Herb seed 5Lantadyme seed1Very rare5,935
Herb seed 5Dwarf weed seed1Very rare10,065
Herb seed 5Torstol seed1Very rare3,498
  1. ^ No anagogic ort is dropped along this drop.

Raw MaterialsEdit

Item Quantity Rarity GE market price
FlaxFlax50–100 (noted)Common1,200–2,400
Runite oreRunite ore1Common10,336
Adamantite oreAdamantite ore3 (noted)Common3,660
Royal dragonhideRoyal dragonhide1Uncommon5,032

OtherEdit

    
Item Quantity Rarity GE market price
Coins 1000Coins5,000CommonNot sold
Saradomin brew (2)Saradomin brew (2)1Common6,259
SharkShark2Common1,610
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 sapphire1Common682
Uncut emeraldUncut emerald1Common1,496
Uncut rubyUncut ruby1Common2,300
Uncut diamondUncut diamond1Common3,910
Uncut diamondUncut diamond45–55 (noted)Rare175,950–215,050
Loop half of a keyLoop half of a key1Uncommon14,863
Tooth half of a keyTooth half of a key1Uncommon33,207
Uncut dragonstoneUncut dragonstone1Uncommon12,516
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare563,220–688,380
Dragon longswordDragon longsword1Common57,829
Dragon spearDragon spear1Uncommon35,887
BattlestaffBattlestaff180–220 (noted)Uncommon1,288,800–1,575,200
Rune javelinRune javelin5Rare890
Rune platebodyRune platebody1Uncommon37,804
Rune platebodyRune platebody15–25 (noted)Rare567,060–945,100
Shield left halfShield left half1Uncommon64,415
Dragon helmDragon helm1Uncommon58,976
Rune arrowheads 5Rune arrowheads113–137Common24,860–30,140
Onyx bolts 5Onyx bolts135–165Rare1,132,245–1,383,855
Vecna skullVecna skull1Uncommon40,543
Chaos talismanChaos talisman1Uncommon903
Nature talismanNature talisman1Uncommon292
Water talismanWater talisman65–82 (noted)Rare748,215–943,902
Earth talismanEarth talisman65–82 (noted)Rare199,355–251,494
Fire talismanFire talisman25–35 (noted)Rare74,050–103,670
Raw lobsterRaw lobster135–165 (noted)Uncommon31,590–38,610
Raw sharkRaw shark225–275 (noted)Uncommon184,275–225,225
Big bonesBig bones79–90 (noted)Uncommon28,993–33,030
Dragon bonesDragon bones180–220 (noted)Uncommon304,740–372,460
CoalCoal200–1,100 (noted)Uncommon73,800–405,900
Gold oreGold ore90–110 (noted)Common14,490–17,710
Adamantite oreAdamantite ore180–220 (noted)Uncommon219,600–268,400
Adamant barAdamant bar15 (noted)Common39,690
Adamant barAdamant bar135–165 (noted)Rare357,210–436,590
Runite oreRunite ore90–110 (noted)Rare930,240–1,136,960
Rune barRune bar3 (noted)Common42,450
Rune barRune bar45–55 (noted)Rare636,750–778,250
Grimy torstolGrimy torstol90–110 (noted)Uncommon434,520–531,080
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon380,970–465,630
Super restore (4)Super restore (4)45–55 (noted)Uncommon161,280–197,120
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon122,670–149,930
Herb seed 5Lantadyme seed14–16Uncommon83,090–94,960
Herb seed 5Dwarf weed seed14–16Uncommon140,910–161,040
Magic seed 5Magic seed4Uncommon411,640
Palm tree seed 5Palm tree seed10Rare1,506,190
FlaxFlax450–550 (noted)Common10,800–13,200
Molten glassMolten glass45–55 (noted)Common6,750–8,250
Soft claySoft clay450–550 (noted)Uncommon85,500–104,500
Yew logsYew logs68–82Uncommon17,136–20,664
Yew logsYew logs675–825 (noted)Rare170,100–207,900
Teak plankTeak plank45–55 (noted)Uncommon29,160–35,640
Mahogany plankMahogany plank270–330 (noted)Rare591,030–722,370
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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