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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 bones1Always416

CharmsEdit

Charm drop numbers
No charmGold charmGreen charmCrimson charmBlue charm
87–88%2–3%1–2%8–9%0.5–0.7%
Represents a 90% confidence range.
Based on a sample of 8,158 kills.
1 charm is dropped at a time.
Please add to the log.
(Only if 50 or more creatures are killed)

Weapons and ArmourEdit

Item Quantity Rarity GE market price
Adamant chainbodyAdamant chainbody1Common1,988
Adamant sq shieldAdamant sq shield1Common1,551
Rune daggerRune dagger1Common4,203
Rune helmRune helm1Common10,623
Rune maceRune mace1Common7,779
Rune longswordRune longsword1Common18,225
Royal capeRoyal cape1Rare304

HerbsEdit

Item Quantity Rarity GE market price
Grimy guamGrimy guam1Uncommon440
Grimy marrentillGrimy marrentill1Uncommon200
Grimy tarrominGrimy tarromin1Uncommon26
Grimy harralanderGrimy harralander1Uncommon99
Grimy ranarrGrimy ranarr1Rare3,051
Grimy iritGrimy irit1Rare2,941
Grimy avantoeGrimy avantoe1Rare5,029
Grimy kwuarmGrimy kwuarm1Rare4,847
Grimy cadantineGrimy cadantine1Very rare3,567
Grimy lantadymeGrimy lantadyme1Very rare7,178
Grimy dwarf weedGrimy dwarf weed1Very rare7,292

SeedsEdit

Item Quantity Rarity GE market price
Fellstalk seed 5Fellstalk seed [1]2Common622
Belladonna seed 5Belladonna seed1Rare99
Cactus seed 5Cactus seed1Rare70
Poison ivy seed 5Poison ivy seed1Rare12
Herb seed 5Toadflax seed1Uncommon688
Herb seed 5Irit seed1Rare177
Herb seed 5Avantoe seed1Rare607
Herb seed 5Kwuarm seed1Rare436
Herb seed 5Snapdragon seed1Very rare972
Herb seed 5Cadantine seed1Very rare553
Herb seed 5Lantadyme seed1Very rare14,531
Herb seed 5Dwarf weed seed1Very rare20,769
Herb seed 5Torstol seed1Very rare10,100
  1. ^ No anagogic ort is dropped along this drop.

Raw MaterialsEdit

Item Quantity Rarity GE market price
FlaxFlax50–100 (noted)Common2,150–4,300
Runite oreRunite ore1Common10,709
Adamantite oreAdamantite ore3 (noted)Common3,660
Royal dragonhideRoyal dragonhide1Uncommon5,308

OtherEdit

    
Item Quantity Rarity GE market price
Coins 1000Coins5,000CommonNot sold
Saradomin brew (2)Saradomin brew (2)1Common2,528
SharkShark2Common2,088
Blood runeBlood rune20Common10,140
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 1000Coins50; 250–500; 3,000CommonNot sold
Uncut sapphireUncut sapphire1Common987
Uncut emeraldUncut emerald1Common1,858
Uncut rubyUncut ruby1Uncommon2,389
Uncut diamondUncut diamond1; 2; 45–55 (noted)Uncommon4,152–228,360
Loop half of a keyLoop half of a key1Uncommon18,799
Tooth half of a keyTooth half of a key1Uncommon36,353
Uncut dragonstoneUncut dragonstone1; 45–55 (noted)Uncommon12,106–665,830
Dragon longswordDragon longsword1Uncommon57,562
Dragon spearDragon spear1Uncommon36,325
BattlestaffBattlestaff180–220 (noted)Uncommon1,281,420–1,566,180
Rune javelinRune javelin5Rare885
Rune platebodyRune platebody1Uncommon38,012
Rune platebodyRune platebody15–25 (noted)Rare570,180–950,300
Shield left halfShield left half1Uncommon64,210
Dragon helmDragon helm1Uncommon59,020
Rune arrowheads 5Rune arrowheads113–137Uncommon22,487–27,263
Onyx bolts 5Onyx bolts135–165Uncommon1,129,815–1,380,885
Vecna skullVecna skull1Uncommon62,390
Water talismanWater talisman65–82 (noted)Uncommon890,565–1,123,482
Earth talismanEarth talisman65–82 (noted)Uncommon210,600–265,680
Fire talismanFire talisman25–35 (noted)Uncommon87,350–122,290
Chaos talismanChaos talisman1Uncommon622
Nature talismanNature talisman1Uncommon254
Raw lobsterRaw lobster135–165 (noted)Uncommon30,510–37,290
Raw sharkRaw shark225–275 (noted)Uncommon288,000–352,000
Big bonesBig bones80–90 (noted)Uncommon33,280–37,440
Dragon bonesDragon bones180–220 (noted)Uncommon488,160–596,640
CoalCoal200–1,100 (noted)Uncommon61,600–338,800
Gold oreGold ore90–110 (noted)Uncommon17,190–21,010
Adamantite oreAdamantite ore180–220 (noted)Uncommon219,600–268,400
Adamant barAdamant bar15 (noted)Common45,945
Adamant barAdamant bar135–165 (noted)Rare413,505–505,395
Runite oreRunite ore90–110 (noted)Rare963,810–1,177,990
Rune barRune bar3 (noted)Common42,834
Rune barRune bar45–55 (noted)Rare642,510–785,290
Grimy torstolGrimy torstol90–110 (noted)Uncommon514,440–628,760
Grimy snapdragonGrimy snapdragon90–110 (noted)Uncommon461,700–564,300
Super restore (4)Super restore (4)45–55 (noted)Uncommon205,830–251,570
Prayer potion (4)Prayer potion (4)45–55 (noted)Uncommon143,775–175,725
Herb seed 5Lantadyme seed14–16Uncommon203,434–232,496
Herb seed 5Dwarf weed seed14–16Uncommon290,766–332,304
Magic seed 5Magic seed4Uncommon700,704
Palm tree seed 5Palm tree seed10Uncommon1,863,600
FlaxFlax450–550 (noted)Uncommon19,350–23,650
Molten glassMolten glass45–55 (noted)Uncommon9,900–12,100
Soft claySoft clay450–550 (noted)Uncommon100,350–122,650
Yew logsYew logs68–82; 675–825 (noted)Uncommon19,516–236,775
Teak plankTeak plank45–55 (noted)Uncommon32,715–39,985
Mahogany plankMahogany plank270–330 (noted)Uncommon546,210–667,590
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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