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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 bones1Always343

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 10,889 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 chainbody1Common2,377
Adamant sq shieldAdamant sq shield1Common3,756
Rune daggerRune dagger1Common4,093
Rune helmRune helm1Common10,318
Rune maceRune mace1Common7,568
Rune longswordRune longsword1Uncommon18,117
Royal capeRoyal cape1Rare535

MaterialsEdit

Item Quantity Rarity GE price
Grimy guamGrimy guam1Uncommon118
Grimy marrentillGrimy marrentill1Uncommon123
Grimy tarrominGrimy tarromin1Uncommon37
Grimy harralanderGrimy harralander1Uncommon100
Grimy ranarrGrimy ranarr1Rare2,264
Grimy iritGrimy irit1Rare1,995
Grimy avantoeGrimy avantoe1Rare2,545
Grimy kwuarmGrimy kwuarm1Rare4,528
Grimy cadantineGrimy cadantine1Very rare4,304
Grimy lantadymeGrimy lantadyme1Very rare3,318
Grimy dwarf weedGrimy dwarf weed1Very rare3,485
Fellstalk seed 5Fellstalk seed2Common762
Belladonna seed 5Belladonna seed1Rare540
Cactus seed 5Cactus seed1Rare198
Poison ivy seed 5Poison ivy seed1Rare37
Toadflax seed 5Toadflax seed1Uncommon319
Irit seed 5Irit seed1Rare170
Avantoe seed 5Avantoe seed1Rare300
Kwuarm seed 5Kwuarm seed1Rare3,408
Snapdragon seed 5Snapdragon seed1Very rare371
Cadantine seed 5Cadantine seed1Very rare3,480
Lantadyme seed 5Lantadyme seed1Very rare1,078
Dwarf weed seed 5Dwarf weed seed1Very rare1,049
Torstol seed 5Torstol seed1Very rare3,549
FlaxFlax50–100 (noted)Common850–1,700
Runite oreRunite ore1Common10,182
Adamantite oreAdamantite ore(noted)Common2,748
Royal dragonhideRoyal dragonhide1Uncommon4,770

OtherEdit

    
Item Quantity Rarity GE price
Coins 1000Coins5,000Common5,000
Saradomin brew (2)Saradomin brew (2)1Common4,314
SharkShark2Common2,064
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 sapphire1Common905
Uncut emeraldUncut emerald1Common1,662
Uncut rubyUncut ruby1Common2,768
Uncut diamondUncut diamond1Common3,596
Uncut diamondUncut diamond45–55 (noted)Rare161,820–197,780
Loop half of a keyLoop half of a key1Common14,193
Tooth half of a keyTooth half of a key1Common25,706
Uncut dragonstoneUncut dragonstone1Uncommon12,808
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare576,360–704,440
Dragon longswordDragon longsword1Common57,101
Dragon spearDragon spear1Rare35,599
BattlestaffBattlestaff180–220 (noted)Rare1,243,260–1,519,540
Rune javelinRune javelin5Rare985
Rune platebodyRune platebody1Uncommon37,565
Rune platebodyRune platebody15–25 (noted)Rare563,475–939,125
Shield left halfShield left half1Rare64,308
Dragon helmDragon helm1Uncommon58,711
Rune arrowheads 5Rune arrowheads113–137Common15,933–19,317
Onyx bolts 5Onyx bolts135–165Very rare1,088,640–1,330,560
Vecna skullVecna skull1Rare76,185
Chaos talismanChaos talisman1Rare928
Nature talismanNature talisman1Rare933
Water talismanWater talisman65–82 (noted)Rare408,265–515,042
Earth talismanEarth talisman65–82 (noted)Rare112,970–142,516
Fire talismanFire talisman25–35 (noted)Rare39,175–54,845
Raw lobsterRaw lobster135–165 (noted)Common13,500–16,500
Raw sharkRaw shark225–275 (noted)Uncommon198,000–242,000
Big bonesBig bones79–90 (noted)Uncommon27,097–30,870
Dragon bonesDragon bones180–220 (noted)Rare327,240–399,960
CoalCoal200–1,100 (noted)Uncommon41,400–227,700
Gold oreGold ore90–110 (noted)Common12,330–15,070
Adamantite oreAdamantite ore180–220 (noted)Uncommon164,880–201,520
Adamant barAdamant bar14–16 (noted)Common35,392–40,448
Adamant barAdamant bar135–165 (noted)Rare341,280–417,120
Runite oreRunite ore90–110 (noted)Rare916,380–1,120,020
Rune barRune bar(noted)Common41,358
Rune barRune bar45–55 (noted)Rare620,370–758,230
Grimy torstolGrimy torstol90–110 (noted)Uncommon362,160–442,640
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon283,500–346,500
Super restore (4)Super restore (4)45–55 (noted)Uncommon168,885–206,415
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon143,685–175,615
Lantadyme seed 5Lantadyme seed14–16Uncommon15,092–17,248
Dwarf weed seed 5Dwarf weed seed14–16Uncommon14,686–16,784
Magic seed 5Magic seed4Uncommon272,348
Palm tree seed 5Palm tree seed10Rare799,380
FlaxFlax450–550 (noted)Common7,650–9,350
Molten glassMolten glass45–55 (noted)Common12,600–15,400
Soft claySoft clay450–550 (noted)Uncommon163,800–200,200
Yew logsYew logs68–82Uncommon12,648–15,252
Yew logsYew logs675–825 (noted)Rare125,550–153,450
Teak plankTeak plank45–55 (noted)Uncommon27,270–33,330
Mahogany plankMahogany plank270–330 (noted)Rare550,800–673,200
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 experience881.4 +
All Combat level98 +
All Is members onlytrue
All Release date22 May 2012 +
Combat experience881.4 +
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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