This article has a strategy guide here.
|Release date||22 May 2012 (Update)|
|Combat level|| 98|
|XP per kill||661 (and 218.1 experience)|
|Always drops||Big bones|
|Examine text||The final stage of a grotworm before its metamorphosis.|
|Assigned by||Turael or Spria, Mazchna or Achtryn, Chaeldar, Sumona, Vannaka, Duradel or Lapalok, Kuradal|
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.
|Profit||Skill requirements||Other requirements||Experience|
80 or or recommended
|Song from the Depths recommended||120,000 |
Item Quantity Rarity GE Market Price Big bones 1 Always 599
- Represents 90% confidence range, based on a sample of 5,762 kills.
1 charm is dropped at a time.
- Please add to the log (only if 50 or more creatures killed).
Weapons and ArmourEdit
Item Quantity Rarity GE Market Price Adamant chainbody 1 Common 2,253 Adamant sq shield 1 Common 1,759 Rune dagger 1 Common 4,327 Rune helm 1 Common 10,662 Rune mace 1 Common 7,880 Rune longsword 1 Common 18,418 Royal cape 1 Rare 160
Item Quantity Rarity GE Market Price Grimy guam 1 Uncommon 910 Grimy marrentill 1 Uncommon 86 Grimy tarromin 1 Uncommon 33 Grimy harralander 1 Uncommon 181 Grimy ranarr 1 Rare 3,662 Grimy irit 1 Rare 2,811 Grimy avantoe 1 Rare 4,794 Grimy kwuarm 1 Rare 3,782 Grimy cadantine 1 Very rare 1,849 Grimy lantadyme 1 Very rare 10,556 Grimy dwarf weed 1 Very rare 12,613
Item Quantity Rarity GE Market Price Fellstalk seed  2 Uncommon 2,286 Belladonna seed 1 Rare 97 Cactus seed 1 Rare 31 Poison ivy seed 1 Rare 3 Toadflax seed 1 Uncommon 1,794 Irit seed 1 Rare 375 Avantoe seed 1 Rare 3,639 Kwuarm seed 1 Rare 1,402 Snapdragon seed 1 Very rare 2,463 Cadantine seed 1 Very rare 844 Lantadyme seed 1 Very rare 44,161 Dwarf weed seed 1 Very rare 61,530 Torstol seed 1 Very rare 23,812
- ^ No anagogic ort is dropped along this drop.
Item Quantity Rarity GE Market Price Flax 50 (noted) Common 3,550 Runite ore 1 Uncommon 11,558 Adamantite ore 3 (noted) Common 6,669 Royal dragonhide 1 Uncommon 6,057
Item Quantity Rarity GE Market Price Coins 5,000 Common Not sold Saradomin brew (2) 1 Common 340 Shark 2 Common 3,344 Blood rune 50 Common 17,050 Long bone 1 Rare Not sold Curved bone 1 Rare Not sold Clue scroll (hard) 1 Rare Not sold Spirit sapphire 1 Rare Not sold Spirit emerald 1 Rare Not sold Spirit ruby 1 Rare Not sold Court summons 1 Very rare Not sold Starved ancient effigy 1 Very rare Not 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 250 – 450; 3,000;
9,000; 10,000; 12,000
Common Not sold Uncut sapphire 1 Common 1,381 Uncut emerald 1 Common 2,934 Uncut ruby 1 Common 3,836 Uncut diamond 1 Uncommon 6,512 Loop half of a key 1 Uncommon 20,060 Tooth half of a key 1 Uncommon 44,631 Uncut dragonstone 1 Rare 15,995 Dragonstone 1 Rare 10,763 Dragon dagger 1 Uncommon 16,398 Rune battleaxe 1 Rare 24,012 Rune javelin 5 Rare 875 Adamant javelin 20 Very rare 1,060 Rune 2h sword 1 Very rare 37,122 Rune spear 1 Very rare 11,462 Dragon spear 1 Very rare 35,975 Dragon dagger 50 (noted) Very rare 819,900 Rune sq shield 1 Very rare 22,388 Rune kiteshield 1 Very rare 32,084 Shield left half 1 Very rare 64,290 Dragon helm 1 Very rare 59,275 Adamant bolts 200 Uncommon 22,000 Onyx bolts 150 Rare 1,272,750 Rune arrow 150–200, 500 Rare 22,950–76,500 Battlestaff 200 (noted) Rare 1,627,000 Air orb 1,000 (noted) Rare 2,630,000 Fire orb 1,000 (noted) Rare 2,057,000 Vecna skull 1 Very rare 101,881 Water talisman 1 Uncommon 13,701 Earth talisman 25–35 (noted) Uncommon 82,075–114,905 Fire talisman 25–35 (noted) Uncommon 82,775–115,885 Chaos talisman 1 Uncommon 965 Nature talisman 1 Uncommon 303 Pure essence 500–15,000 (noted) Uncommon 9,000–270,000 Nature rune 20–80 Rare 6,040–24,160 Soul rune 20 Rare 3,280 Law rune 45 Rare 12,915 Death rune 50, 121 Rare 8,900–21,538 Blood rune 50 Rare 17,050 Raw swordfish 125–250, 1,000 (noted) Uncommon 47,000–376,000 Raw shark 250–500 (noted) Uncommon 404,000–808,000 Big bones 150–500 (noted) Uncommon 89,850–299,500 Coal 150–7,500 (noted) Uncommon 33,750–1,687,500 Adamantite ore 150–800 (noted) Uncommon 333,450–1,778,400 Silver ore 100 (noted) Rare 10,100 Runite ore 100 (noted) Rare 1,155,800 Adamant bar 1,000–7,000 (noted) Rare 3,268,000–22,876,000 Rune bar 1, 50, 150 (noted) Rare 14,548–2,182,200 Clean ranarr 33 (noted) Uncommon 124,674 Clean toadflax 25–250 (noted) Uncommon 122,000–1,220,000 Clean snapdragon 30–120 (noted) Uncommon 154,260–617,040 Clean torstol 10–100 (noted) Uncommon 77,540–775,400 Saradomin brew (4) 250 (noted) Very rare 172,750 Watermelon seed 3 Uncommon 6,045 Yew seed 1–50 Rare 66,581–3,329,050 Magic seed 1–7 Rare 161,950–1,133,650 Palm tree seed 10 Rare 1,013,300 Snapdragon seed 1 Rare 2,463 Torstol seed 1–31 Rare 23,812–738,172 Fellstalk seed 2 Rare 2,286 Yew logs 50–20,000 (noted) Rare 24,800–9,920,000 Crystal triskelion fragment 1 1 Very rare Not sold Crystal triskelion fragment 2 1 Very rare Not sold Crystal triskelion fragment 3 1 Very rare Not sold Brawling gloves (Melee) 1 Very rare Not sold Brawling gloves (Magic) 1 Very rare Not sold Brawling gloves (Ranged) 1 Very rare Not sold Brawling gloves (Agility) 1 Very rare Not sold Brawling gloves (Cooking) 1 Very rare Not sold Brawling gloves (FM) 1 Very rare Not sold Brawling gloves (Fishing) 1 Very rare Not sold Brawling gloves (Hunter) 1 Very rare Not sold Brawling gloves (Mining) 1 Very rare Not sold Brawling gloves (Prayer) 1 Very rare Not sold Brawling gloves (Smithing) 1 Very rare Not sold Brawling gloves (Thieving) 1 Very rare Not sold Brawling gloves (WC) 1 Very rare Not sold
- Universal drops are dropped by every monster outside of Daemonheim.
- These drops are dropped alongside main drops.
Item Quantity Rarity GE Market Price Key token 1 Rare Not sold
- 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 lifepoints 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 lifepoints 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.
|Monsters||Queen Black Dragon • Giant worm • Tortured soul • Young grotworm • Grotworm • Mature grotworm|
|Drops||Royal dragonhide • Royal cape • Coral bolts • Royal bolts • Dragonbone upgrade kit • Draconic visage|
|Royal crossbow||Coral crossbow • Royal sight • Royal bolt stabiliser • Royal frame • Royal torsion spring|
|Dragonkin journals||First • Second • Third • Fourth|
|White Knights||Sir Loynst Ayke • Sir Pent • Sir Remony • Sir Render • Sir Rial • Sir Rillic • Sir Rinch • Sir Rogate • Sir Rownd • Sir Ruppe • Sir Vey|
|Misc.||QBD Strategies • QBD money making • Mature grotworms money making • Coral crossbow|