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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 bones1Always352

CharmsEdit

No charmGold charmGreen charmCrimson charmBlue charm
87–88%3%1–2%8%0.4–0.7%
Represents a 90% confidence range.
Based on a sample of 10,804 kills.
1 charm is dropped at a time.
Add data to the log
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Weapons and ArmourEdit

Item Quantity Rarity GE price
Adamant chainbodyAdamant chainbody1Common2,646
Adamant sq shieldAdamant sq shield1Common3,527
Rune daggerRune dagger1Common5,939
Rune helmRune helm1Common10,769
Rune maceRune mace1Common7,869
Rune longswordRune longsword1Uncommon18,509
Royal capeRoyal cape1Rare713

HerbsEdit

Item Quantity Rarity GE price
Grimy guamGrimy guam1Uncommon224
Grimy marrentillGrimy marrentill1Uncommon188
Grimy tarrominGrimy tarromin1Uncommon46
Grimy harralanderGrimy harralander1Uncommon157
Grimy ranarrGrimy ranarr1Rare2,965
Grimy iritGrimy irit1Rare2,548
Grimy avantoeGrimy avantoe1Rare4,863
Grimy kwuarmGrimy kwuarm1Rare5,966
Grimy cadantineGrimy cadantine1Very rare5,675
Grimy lantadymeGrimy lantadyme1Very rare5,823
Grimy dwarf weedGrimy dwarf weed1Very rare5,564

SeedsEdit

Item Quantity Rarity GE price
Fellstalk seed 5Fellstalk seed[1]2Common804
Belladonna seed 5Belladonna seed1Rare552
Cactus seed 5Cactus seed1Rare104
Poison ivy seed 5Poison ivy seed1Rare32
Toadflax seed 5Toadflax seed1Uncommon154
Irit seed 5Irit seed1Rare161
Avantoe seed 5Avantoe seed1Rare419
Kwuarm seed 5Kwuarm seed1Rare1,960
Snapdragon seed 5Snapdragon seed1Very rare355
Cadantine seed 5Cadantine seed1Very rare1,014
Lantadyme seed 5Lantadyme seed1Very rare3,056
Dwarf weed seed 5Dwarf weed seed1Very rare3,241
Torstol seed 5Torstol seed1Very rare2,698
  1. ^ No anagogic ort is dropped along this drop.

Raw MaterialsEdit

Item Quantity Rarity GE price
FlaxFlax50–100 (noted)Common1,050–2,100
Runite oreRunite ore1Common9,360
Adamantite oreAdamantite ore3 (noted)Common3,366
Royal dragonhideRoyal dragonhide1Uncommon5,888

OtherEdit

    
Item Quantity Rarity GE price
Coins 1000Coins5,000Common5,000
Saradomin brew (2)Saradomin brew (2)1Common4,797
SharkShark2Common2,060
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 price
Coins 1000Coins250–500; 3,000Common250–3,000
Uncut sapphireUncut sapphire1Common1,246
Uncut emeraldUncut emerald1Common2,122
Uncut rubyUncut ruby1Common3,718
Uncut diamondUncut diamond1Common6,351
Uncut diamondUncut diamond45–55 (noted)Rare285,795–349,305
Loop half of a keyLoop half of a key1Common18,580
Tooth half of a keyTooth half of a key1Common31,235
Uncut dragonstoneUncut dragonstone1Uncommon14,213
Uncut dragonstoneUncut dragonstone45–55 (noted)Rare639,585–781,715
Dragon longswordDragon longsword1Common57,825
Dragon spearDragon spear1Rare35,868
BattlestaffBattlestaff180–220 (noted)Rare1,329,480–1,624,920
Rune javelinRune javelin5Rare1,385
Rune platebodyRune platebody1Uncommon37,902
Rune platebodyRune platebody15–25 (noted)Rare568,530–947,550
Shield left halfShield left half1Rare64,489
Dragon helmDragon helm1Uncommon59,008
Rune arrowheads 5Rune arrowheads113–137Common17,967–21,783
Onyx bolts 5Onyx bolts135–165Very rare1,133,730–1,385,670
Vecna skullVecna skull1Rare79,808
Chaos talismanChaos talisman1Rare1,360
Nature talismanNature talisman1Rare874
Water talismanWater talisman65–82 (noted)Rare659,880–832,464
Earth talismanEarth talisman65–82 (noted)Rare183,690–231,732
Fire talismanFire talisman25–35 (noted)Rare61,500–86,100
Raw lobsterRaw lobster135–165 (noted)Common17,955–21,945
Raw sharkRaw shark225–275 (noted)Uncommon238,050–290,950
Big bonesBig bones79–90 (noted)Uncommon27,808–31,680
Dragon bonesDragon bones180–220 (noted)Rare553,140–676,060
CoalCoal200–1,100 (noted)Uncommon82,200–452,100
Gold oreGold ore90–110 (noted)Common15,030–18,370
Adamantite oreAdamantite ore180–220 (noted)Uncommon201,960–246,840
Adamant barAdamant bar15 (noted)Common54,075
Adamant barAdamant bar135–165 (noted)Rare486,675–594,825
Runite oreRunite ore90–110 (noted)Rare842,400–1,029,600
Rune barRune bar3 (noted)Common41,838
Rune barRune bar45–55 (noted)Rare627,570–767,030
Grimy torstolGrimy torstol90–110 (noted)Uncommon491,580–600,820
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon349,650–427,350
Super restore (4)Super restore (4)45–55 (noted)Uncommon243,675–297,825
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon162,360–198,440
Lantadyme seed 5Lantadyme seed14–16Uncommon42,784–48,896
Dwarf weed seed 5Dwarf weed seed14–16Uncommon45,374–51,856
Magic seed 5Magic seed4Uncommon341,468
Palm tree seed 5Palm tree seed10Rare882,030
FlaxFlax450–550 (noted)Common9,450–11,550
Molten glassMolten glass45–55 (noted)Common14,535–17,765
Soft claySoft clay450–550 (noted)Uncommon130,500–159,500
Yew logsYew logs68–82Uncommon16,864–20,336
Yew logsYew logs675–825 (noted)Rare167,400–204,600
Teak plankTeak plank45–55 (noted)Uncommon30,735–37,565
Mahogany plankMahogany plank270–330 (noted)Rare592,650–724,350
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.

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