This article is about level 140 Grotworms. For other types of Grotworms, see Grotworm (disambiguation).
This article has a strategy guide here.
|Release date||22 May 2012 (Update)|
|Combat level|| 140|
|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 580
- Represents 90% confidence range, based on a sample of 3,289 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 2,324 Adamant sq shield 1 Common 1,695 Rune dagger 1 Common 4,366 Rune helm 1 Common 10,724 Rune mace 1 Common 7,892 Rune longsword 1 Common 18,502 Royal cape 1 Uncommon 133
Item Quantity Rarity GE Market Price Grimy guam 1 Uncommon 516 Grimy marrentill 1 Uncommon 81 Grimy tarromin 1 Uncommon 39 Grimy harralander 1 Uncommon 206 Grimy ranarr 1 Uncommon 2,994 Grimy irit 1 Uncommon 2,736 Grimy avantoe 1 Uncommon 4,657 Grimy kwuarm 1 Uncommon 2,904 Grimy cadantine 1 Rare 1,976 Grimy lantadyme 1 Rare 9,396 Grimy dwarf weed 1 Rare 10,471
Item Quantity Rarity GE Market Price Fellstalk seed  2 Uncommon 1,822 Belladonna seed 1 Rare 625 Cactus seed 1 Rare 35 Poison ivy seed 1 Rare 1 Toadflax seed 1 Rare 1,960 Irit seed 1 Rare 238 Avantoe seed 1 Rare 3,142 Kwuarm seed 1 Rare 337 Snapdragon seed 1 Very rare 1,394 Cadantine seed 1 Very rare 1,829 Lantadyme seed 1 Very rare 38,005 Dwarf weed seed 1 Very rare 48,498 Torstol seed 1 Very rare 18,087
- ^ No anagogic ort is dropped along this drop.
Item Quantity Rarity GE Market Price Flax 50 (noted) Common 2,350 Runite ore 1 Common 10,721 Adamantite ore 3 (noted) Common 7,440 Royal dragonhide 1 Uncommon 5,986
Item Quantity Rarity GE Market Price Coins 5,000 Common Not sold Saradomin brew (2) 1 Common 149 Shark 2 Common 2,952 Blood rune 50 Uncommon 10,150 Law rune 10–45 Rare 2,900–13,050 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 1,365 Uncut emerald 1 Common 3,107 Uncut ruby 1 Common 3,244 Uncut diamond 1 Uncommon 7,071 Loop half of a key 1 Uncommon 19,583 Tooth half of a key 1 Uncommon 40,944 Uncut dragonstone 1 Rare 14,675 Dragonstone 1 Rare 9,683 Dragon dagger 1 Uncommon 16,619 Rune battleaxe 1 Rare 24,166 Rune javelin 5 Rare 880 Adamant javelin 20 Very rare 1,120 Rune 2h sword 1 Very rare 37,465 Rune spear 1 Very rare 11,317 Dragon spear 1 Very rare 36,619 Dragon dagger 50 (noted) Very rare 830,950 Rune sq shield 1 Very rare 22,361 Rune kiteshield 1 Very rare 31,721 Shield left half 1 Very rare 64,789 Dragon helm 1 Very rare 60,102 Adamant bolts 200 Uncommon 11,600 Onyx bolts 150 Rare 1,262,850 Rune arrow 150–200, 500 Rare 22,650–75,500 Battlestaff 200 (noted) Rare 1,612,800 Air orb 1,000 (noted) Rare 2,842,000 Fire orb 1,000 (noted) Rare 2,151,000 Vecna skull 1 Very rare 138,893 Water talisman 1 Uncommon 11,495 Earth talisman 25–35 (noted) Uncommon 35,800–50,120 Fire talisman 25–35 (noted) Uncommon 47,050–65,870 Chaos talisman 1 Uncommon 602 Nature talisman 1 Uncommon 464 Pure essence 500–15,000 (noted) Uncommon 6,500–195,000 Nature rune 20–80 Rare 6,440–25,760 Soul rune 20 Rare 2,880 Law rune 45 Rare 13,050 Death rune 50, 121 Rare 5,900–14,278 Blood rune 50 Rare 10,150 Raw swordfish 125–250, 1,000 (noted) Uncommon 41,000–328,000 Raw shark 250–500 (noted) Uncommon 416,750–833,500 Big bones 150–500 (noted) Uncommon 87,000–290,000 Coal 150–7,500 (noted) Uncommon 28,800–1,440,000 Adamantite ore 150–800 (noted) Uncommon 372,000–1,984,000 Silver ore 100 (noted) Rare 10,000 Runite ore 100 (noted) Rare 1,072,100 Adamant bar 1,000–7,000 (noted) Rare 3,403,000–23,821,000 Rune bar 1, 50, 150 (noted) Rare 13,067–1,960,050 Clean ranarr 33 (noted) Uncommon 102,069 Clean toadflax 25–250 (noted) Uncommon 107,425–1,074,250 Clean snapdragon 30–120 (noted) Uncommon 128,760–515,040 Clean torstol 10–100 (noted) Uncommon 66,180–661,800 Saradomin brew (4) 250 (noted) Very rare 99,250 Watermelon seed 3 Uncommon 8,532 Yew seed 1–50 Rare 70,555–3,527,750 Magic seed 1–7 Rare 159,552–1,116,864 Palm tree seed 10 Rare 1,032,110 Snapdragon seed 1 Rare 1,394 Torstol seed 1–31 Rare 18,087–560,697 Fellstalk seed 2 Rare 1,822 Yew logs 50–20,000 (noted) Rare 27,300–10,920,000 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
- 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.
- 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.