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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 bones1Always386

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 11,171 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 chainbody1Common2,063
Adamant sq shieldAdamant sq shield1Common3,787
Rune daggerRune dagger1Common3,903
Rune helmRune helm1Common9,920
Rune maceRune mace1Common7,268
Rune longswordRune longsword1Uncommon17,900
Royal capeRoyal cape1Rare713

MaterialsEdit

Item Quantity Rarity GE price
Grimy guamGrimy guam1Uncommon103
Grimy marrentillGrimy marrentill1Uncommon134
Grimy tarrominGrimy tarromin1Uncommon35
Grimy harralanderGrimy harralander1Uncommon80
Grimy ranarrGrimy ranarr1Rare2,459
Grimy iritGrimy irit1Rare4,297
Grimy avantoeGrimy avantoe1Rare2,701
Grimy kwuarmGrimy kwuarm1Rare6,343
Grimy cadantineGrimy cadantine1Very rare5,886
Grimy lantadymeGrimy lantadyme1Very rare3,808
Grimy dwarf weedGrimy dwarf weed1Very rare3,617
Fellstalk seed 5Fellstalk seed2Common718
Belladonna seed 5Belladonna seed1Rare416
Cactus seed 5Cactus seed1Rare244
Poison ivy seed 5Poison ivy seed1Rare76
Toadflax seed 5Toadflax seed1Uncommon706
Irit seed 5Irit seed1Rare398
Avantoe seed 5Avantoe seed1Rare227
Kwuarm seed 5Kwuarm seed1Rare5,539
Snapdragon seed 5Snapdragon seed1Very rare353
Cadantine seed 5Cadantine seed1Very rare4,842
Lantadyme seed 5Lantadyme seed1Very rare910
Dwarf weed seed 5Dwarf weed seed1Very rare969
Torstol seed 5Torstol seed1Very rare2,784
FlaxFlax50–100 (noted)Common450–900
Runite oreRunite ore1Common10,575
Adamantite oreAdamantite ore(noted)Common2,898
Royal dragonhideRoyal dragonhide1Uncommon5,632

OtherEdit

    
Item Quantity Rarity GE price
Coins 1000Coins5,000Common5,000
Saradomin brew (2)Saradomin brew (2)1Common4,993
SharkShark2Common1,788
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 sapphire1Common1,000
Uncut emeraldUncut emerald1Common2,019
Uncut rubyUncut ruby1Common3,497
Uncut diamondUncut diamond1Common4,828
Uncut diamondUncut diamond45–55 (noted)Rare217,260–265,540
Loop half of a keyLoop half of a key1Common15,000
Tooth half of a keyTooth half of a key1Common23,547
Uncut dragonstoneUncut dragonstone1Uncommon13,900
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare625,500–764,500
Dragon longswordDragon longsword1Common56,846
Dragon spearDragon spear1Rare33,962
BattlestaffBattlestaff180–220 (noted)Rare1,252,260–1,530,540
Rune javelinRune javelin5Rare955
Rune platebodyRune platebody1Uncommon37,185
Rune platebodyRune platebody15–25 (noted)Rare557,775–929,625
Shield left halfShield left half1Rare63,821
Dragon helmDragon helm1Uncommon58,583
Rune arrowheads 5Rune arrowheads113–137Common18,532–22,468
Onyx bolts 5Onyx bolts135–165Very rare1,085,535–1,326,765
Vecna skullVecna skull1Very rare73,982
Chaos talismanChaos talisman1Rare1,003
Nature talismanNature talisman1Rare907
Water talismanWater talisman65–82 (noted)Rare458,965–579,002
Earth talismanEarth talisman65–82 (noted)Rare130,325–164,410
Fire talismanFire talisman25–35 (noted)Rare47,175–66,045
Raw lobsterRaw lobster135–165 (noted)Common12,825–15,675
Raw sharkRaw shark225–275 (noted)Uncommon228,825–279,675
Big bonesBig bones72–90 (noted)Uncommon27,792–34,740
Dragon bonesDragon bones180–220 (noted)Rare285,840–349,360
CoalCoal200–1,100 (noted)Uncommon31,600–173,800
Gold oreGold ore90–110 (noted)Common11,610–14,190
Adamantite oreAdamantite ore180–220 (noted)Uncommon173,880–212,520
Adamant barAdamant bar14–16 (noted)Common38,654–44,176
Adamant barAdamant bar135–165 (noted)Rare372,735–455,565
Runite oreRunite ore90–110 (noted)Rare951,750–1,163,250
Rune barRune bar(noted)Common41,826
Rune barRune bar45–55 (noted)Rare627,390–766,810
Grimy torstolGrimy torstol90–110 (noted)Uncommon474,660–580,140
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon381,690–466,510
Super restore (4)Super restore (4)45–55 (noted)Uncommon261,540–319,660
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon148,230–181,170
Lantadyme seed 5Lantadyme seed14–16Uncommon12,740–14,560
Dwarf weed seed 5Dwarf weed seed14–16Uncommon13,566–15,504
Magic seed 5Magic seed4Uncommon349,312
Palm tree seed 5Palm tree seed10Rare1,203,280
FlaxFlax450–550 (noted)Common4,050–4,950
Molten glassMolten glass45–55 (noted)Common12,690–15,510
Soft claySoft clay450–550 (noted)Uncommon144,000–176,000
Yew logsYew logs68–82Uncommon11,288–13,612
Yew logsYew logs675–825 (noted)Rare112,050–136,950
Teak plankTeak plank45–55 (noted)Uncommon35,595–43,505
Mahogany plankMahogany plank270–330 (noted)Rare629,100–768,900
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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