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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. 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. Alternatively, players could disassemble the drops for Invention experience and materials.

DropsEdit

100% dropEdit

Item Quantity Rarity GE price
Big bonesBig bones1Always340

CharmsEdit

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 10,939 kills.
1 charm is dropped at a time.
Add data to the log
(Requires JavaScript to be enabled)

Weapons and armourEdit

Item Quantity Rarity GE price
Adamant chainbodyAdamant chainbody1Common2,351
Adamant sq shieldAdamant sq shield1Common3,274
Rune daggerRune dagger1Common4,148
Rune helmRune helm1Common10,474
Rune maceRune mace1Common7,114
Rune longswordRune longsword1Uncommon17,993
Royal capeRoyal cape1Rare609

MaterialsEdit

Item Quantity Rarity GE price
Grimy guamGrimy guam1Uncommon110
Grimy marrentillGrimy marrentill1Uncommon152
Grimy tarrominGrimy tarromin1Uncommon35
Grimy harralanderGrimy harralander1Uncommon87
Grimy ranarrGrimy ranarr1Rare2,782
Grimy iritGrimy irit1Rare2,354
Grimy avantoeGrimy avantoe1Rare2,702
Grimy kwuarmGrimy kwuarm1Rare5,207
Grimy cadantineGrimy cadantine1Very rare4,857
Grimy lantadymeGrimy lantadyme1Very rare3,285
Grimy dwarf weedGrimy dwarf weed1Very rare3,639
Fellstalk seed 5Fellstalk seed2Common764
Belladonna seed 5Belladonna seed1Rare466
Cactus seed 5Cactus seed1Rare207
Poison ivy seed 5Poison ivy seed1Rare41
Toadflax seed 5Toadflax seed1Uncommon513
Irit seed 5Irit seed1Rare186
Avantoe seed 5Avantoe seed1Rare245
Kwuarm seed 5Kwuarm seed1Rare2,100
Snapdragon seed 5Snapdragon seed1Very rare468
Cadantine seed 5Cadantine seed1Very rare4,404
Lantadyme seed 5Lantadyme seed1Very rare914
Dwarf weed seed 5Dwarf weed seed1Very rare924
Torstol seed 5Torstol seed1Very rare3,051
FlaxFlax50–100 (noted)Common750–1,500
Runite oreRunite ore1Common11,021
Adamantite oreAdamantite ore(noted)Common2,154
Royal dragonhideRoyal dragonhide1Uncommon4,981

OtherEdit

    
Item Quantity Rarity GE price
Coins 1000Coins5,000Common5,000
Saradomin brew (2)Saradomin brew (2)1Common5,662
SharkShark2Common1,912
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.
A ring of wealth or collector's insignia are not required to access the table.
Show/hide rare drop table
Item Quantity Rarity GE price
Coins 1000Coins250–500; 3,000Common250–3,000
Uncut sapphireUncut sapphire1Common888
Uncut emeraldUncut emerald1Common1,785
Uncut rubyUncut ruby1Common3,221
Uncut diamondUncut diamond1Common3,785
Uncut diamondUncut diamond45–55 (noted)Rare170,325–208,175
Loop half of a keyLoop half of a key1Common15,466
Tooth half of a keyTooth half of a key1Common25,634
Uncut dragonstoneUncut dragonstone1Uncommon12,569
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare565,605–691,295
Dragon longswordDragon longsword1Common57,779
Dragon spearDragon spear1Rare36,087
BattlestaffBattlestaff180–220 (noted)Rare1,231,560–1,505,240
Rune javelinRune javelin5Rare920
Rune platebodyRune platebody1Uncommon37,631
Rune platebodyRune platebody15–25 (noted)Rare564,465–940,775
Shield left halfShield left half1Rare63,800
Dragon helmDragon helm1Uncommon58,519
Rune arrowheads 5Rune arrowheads113–137Common19,436–23,564
Onyx bolts 5Onyx bolts135–165Very rare1,096,740–1,340,460
Vecna skullVecna skull1Rare70,854
Chaos talismanChaos talisman1Rare962
Nature talismanNature talisman1Rare1,214
Water talismanWater talisman65–82 (noted)Rare449,540–567,112
Earth talismanEarth talisman65–82 (noted)Rare114,010–143,828
Fire talismanFire talisman25–35 (noted)Rare44,625–62,475
Raw lobsterRaw lobster135–165 (noted)Common14,850–18,150
Raw sharkRaw shark225–275 (noted)Uncommon202,500–247,500
Big bonesBig bones76–90 (noted)Uncommon25,840–30,600
Dragon bonesDragon bones180–220 (noted)Rare311,580–380,820
CoalCoal200–1,100 (noted)Uncommon38,400–211,200
Gold oreGold ore90–110 (noted)Common12,780–15,620
Adamantite oreAdamantite ore180–220 (noted)Uncommon129,240–157,960
Adamant barAdamant bar14–16 (noted)Common34,034–38,896
Adamant barAdamant bar135–165 (noted)Rare328,185–401,115
Runite oreRunite ore90–110 (noted)Rare991,890–1,212,310
Rune barRune bar(noted)Common41,412
Rune barRune bar45–55 (noted)Rare621,180–759,220
Grimy torstolGrimy torstol90–110 (noted)Uncommon388,620–474,980
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon419,130–512,270
Super restore (4)Super restore (4)45–55 (noted)Uncommon235,980–288,420
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon147,015–179,685
Lantadyme seed 5Lantadyme seed14–16Uncommon12,796–14,624
Dwarf weed seed 5Dwarf weed seed14–16Uncommon12,936–14,784
Magic seed 5Magic seed4Uncommon266,124
Palm tree seed 5Palm tree seed10Rare1,005,350
FlaxFlax450–550 (noted)Common6,750–8,250
Molten glassMolten glass45–55 (noted)Common11,475–14,025
Soft claySoft clay450–550 (noted)Uncommon171,000–209,000
Yew logsYew logs68–82Uncommon10,880–13,120
Yew logsYew logs675–825 (noted)Rare108,000–132,000
Teak plankTeak plank45–55 (noted)Uncommon30,825–37,675
Mahogany plankMahogany plank270–330 (noted)Rare564,840–690,360
Brawling gloves (Melee)Brawling gloves (Melee)1Very rareNot sold
Brawling gloves (Magic)Brawling gloves (Magic)1Very rareNot sold
Brawling gloves (Ranged)Brawling gloves (Ranged)1Very rareNot sold
Brawling gloves (Agility)Brawling gloves (Agility)1Very rareNot sold
Brawling gloves (Cooking)Brawling gloves (Cooking)1Very rareNot sold
Brawling gloves (FM)Brawling gloves (FM)1Very rareNot sold
Brawling gloves (Fishing)Brawling gloves (Fishing)1Very rareNot sold
Brawling gloves (Hunter)Brawling gloves (Hunter)1Very rareNot sold
Brawling gloves (Mining)Brawling gloves (Mining)1Very rareNot sold
Brawling gloves (Prayer)Brawling gloves (Prayer)1Very rareNot sold
Brawling gloves (Smithing)Brawling gloves (Smithing)1Very rareNot sold
Brawling gloves (Thieving)Brawling gloves (Thieving)1Very rareNot sold
Brawling gloves (WC)Brawling gloves (WC)1Very rareNot 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 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.
Facts about "Mature grotworm"RDF feed
All Combat experience661 +
All Combat level98 +
All Is members onlytrue
All Release date22 May 2012 +
Combat experience661 +
Combat level98 +
Drop JSON{ "name": "Big bones", "quantity": [1,1], "rarity": "Always" }, { "name": "Adamant chainbody", "quantity": [1,1], "rarity": "Common" }, { "name": "Adamant sq shield", "quantity": [1,1], "rarity": "Common" }, { "name": "Rune dagger", "quantity": [1,1], "rarity": "Common" }, { "name": "Rune helm", "quantity": [1,1], "rarity": "Common" }, { "name": "Rune mace", "quantity": [1,1], "rarity": "Common" }, { "name": "Rune longsword", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Royal cape", "quantity": [1,1], "rarity": "Rare" }, { "name": "Grimy guam", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Grimy marrentill", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Grimy tarromin", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Grimy harralander", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Grimy ranarr", "quantity": [1,1], "rarity": "Rare" }, { "name": "Grimy irit", "quantity": [1,1], "rarity": "Rare" }, { "name": "Grimy avantoe", "quantity": [1,1], "rarity": "Rare" }, { "name": "Grimy kwuarm", "quantity": [1,1], "rarity": "Rare" }, { "name": "Grimy cadantine", "quantity": [1,1], "rarity": "Very rare" }, { "name": "Grimy lantadyme", "quantity": [1,1], "rarity": "Very rare" }, { "name": "Grimy dwarf weed", "quantity": [1,1], "rarity": "Very rare" }, { "name": "Fellstalk seed", "quantity": [2,2], "rarity": "Common" }, { "name": "Belladonna seed", "quantity": [1,1], "rarity": "Rare" }, { "name": "Cactus seed", "quantity": [1,1], "rarity": "Rare" }, { "name": "Poison ivy seed", "quantity": [1,1], "rarity": "Rare" }, { "name": "Toadflax seed", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Irit seed", "quantity": [1,1], "rarity": "Rare" }, { "name": "Avantoe seed", "quantity": [1,1], "rarity": "Rare" }, { "name": "Kwuarm seed", "quantity": [1,1], "rarity": "Rare" }, { "name": "Snapdragon seed", "quantity": [1,1], "rarity": "Very rare" }, { "name": "Cadantine seed", "quantity": [1,1], "rarity": "Very rare" }, { "name": "Lantadyme seed", "quantity": [1,1], "rarity": "Very rare" }, { "name": "Dwarf weed seed", "quantity": [1,1], "rarity": "Very rare" }, { "name": "Torstol seed", "quantity": [1,1], "rarity": "Very rare" }, { "name": "Flax", "quantity": [50,100], "rarity": "Common" }, { "name": "Runite ore", "quantity": [1,1], "rarity": "Common" }, { "name": "Adamantite ore", "quantity": [3,3], "rarity": "Common" }, { "name": "Royal dragonhide", "quantity": [1,1], "rarity": "Uncommon" }, { "name": "Coins", "quantity": [5000,5000], "rarity": "Common" }, { "name": "Saradomin brew (2)", "quantity": [1,1], "rarity": "Common" }, { "name": "Shark", "quantity": [2,2], "rarity": "Common" }, { "name": "Long bone", "quantity": [1,1], "rarity": "Rare" }, { "name": "Curved bone", "quantity": [1,1], "rarity": "Rare" }, { "name": "Clue scroll (hard)", "quantity": [1,1], "rarity": "Rare" }, { "name": "Spirit sapphire", "quantity": [1,1], "rarity": "Rare" }, { "name": "Spirit emerald", "quantity": [1,1], "rarity": "Rare" }, { "name": "Spirit ruby", "quantity": [1,1], "rarity": "Rare" }, { "name": "Court summons", "quantity": [1,1], "rarity": "Very rare" }, { "name": "Starved ancient effigy", "quantity": [1,1], "rarity": "Very rare" } and { "name": "Key token", "quantity": [1,1], "rarity": "Rare" }
Drops itemBig bones +, Adamant chainbody +, Adamant sq shield +, Rune dagger +, Rune helm +, Rune mace +, Rune longsword +, Royal cape +, Grimy guam +, Grimy marrentill +, Grimy tarromin +, Grimy harralander +, Grimy ranarr +, Grimy irit +, Grimy avantoe +, Grimy kwuarm +, Grimy cadantine +, Grimy lantadyme +, Grimy dwarf weed +, Fellstalk seed +, Belladonna seed +, Cactus seed +, Poison ivy seed +, Toadflax seed +, Irit seed +, Avantoe seed +, Kwuarm seed +, Snapdragon seed +, Cadantine seed +, Lantadyme seed +, Dwarf weed seed +, Torstol seed +, Flax +, Runite ore +, Adamantite ore +, Royal dragonhide +, Coins +, Saradomin brew (2) +, Shark +, Long bone +, Curved bone +, Clue scroll (hard) +, Spirit sapphire +, Spirit emerald +, Spirit ruby +, Court summons +, Starved ancient effigy + and Key token +
Drops item from RDTCoins +, Uncut sapphire +, Uncut emerald +, Uncut ruby +, Uncut diamond +, Loop half of a key +, Tooth half of a key +, Uncut dragonstone +, Dragon longsword +, Dragon spear +, Battlestaff +, Rune javelin +, Rune platebody +, Shield left half +, Dragon helm +, Rune arrowheads +, Onyx bolts +, Vecna skull +, Chaos talisman +, Nature talisman +, Water talisman +, Earth talisman +, Fire talisman +, Raw lobster +, Raw shark +, Big bones +, Dragon bones +, Coal +, Gold ore +, Adamantite ore +, Adamant bar +, Runite ore +, Rune bar +, Grimy torstol +, Grimy snapdragon +, Super restore (4) +, Prayer potion (4) +, Lantadyme seed +, Dwarf weed seed +, Magic seed +, Palm tree seed +, Flax +, Molten glass +, Soft clay +, Yew logs +, Teak plank +, Mahogany plank +, Brawling gloves (Melee) +, Brawling gloves (Magic) +, Brawling gloves (Ranged) +, Brawling gloves (Agility) +, Brawling gloves (Cooking) +, Brawling gloves (FM) +, Brawling gloves (Fishing) +, Brawling gloves (Hunter) +, Brawling gloves (Mining) +, Brawling gloves (Prayer) +, Brawling gloves (Smithing) +, Brawling gloves (Thieving) +, Brawling gloves (WC) +, Crystal triskelion fragment 1 +, Crystal triskelion fragment 2 + and Crystal triskelion fragment 3 +
Is members onlytrue
Release date22 May 2012 +

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