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 558
- Represents 90% confidence range, based on a sample of 3,017 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 2,384 Adamant sq shield 1 Common 1,829 Rune dagger 1 Common 4,293 Rune helm 1 Common 10,588 Rune mace 1 Common 7,939 Rune longsword 1 Common 18,420 Royal cape 1 Uncommon 95
Item Quantity Rarity GE Market Price Grimy guam 1 Uncommon 622 Grimy marrentill 1 Uncommon 90 Grimy tarromin 1 Uncommon 44 Grimy harralander 1 Uncommon 195 Grimy ranarr 1 Uncommon 3,156 Grimy irit 1 Uncommon 2,461 Grimy avantoe 1 Uncommon 4,298 Grimy kwuarm 1 Uncommon 2,376 Grimy cadantine 1 Rare 1,993 Grimy lantadyme 1 Rare 8,917 Grimy dwarf weed 1 Rare 10,847
Item Quantity Rarity GE Market Price Cactus seed 1 Uncommon 19 Poison ivy seed 1 Uncommon 1 Avantoe seed 1–2 Uncommon 4,518–9,036 Fellstalk seed  2 Uncommon 1,488 Cadantine seed 1 Uncommon 2,658 Irit seed 1 Uncommon 239 Belladonna seed 1 Uncommon 397 Toadflax seed 1 Uncommon 1,837 Kwuarm seed 1 Rare 288 Snapdragon seed 1 Rare 1,952 Lantadyme seed 1 Very rare 38,583 Torstol seed 1 Very rare 18,717 Dwarf weed seed 1 Very rare 49,385
- ^ No anagogic ort is dropped along this drop.
Item Quantity Rarity GE Market Price Flax 50 (noted) Common 1,550 Runite ore 1 Uncommon 10,574 Adamantite ore 3 (noted) Uncommon 8,508 Royal dragonhide 1 Uncommon 5,915
Item Quantity Rarity GE Market Price Coins 5,000 Common Not sold Shark 2 Common 3,196 Saradomin brew (2) 1 Common 146 Blood rune 10, 50, 100, 150 Common 2,700–40,500 Law rune 10–45 Rare 2,980–13,410 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 1,746 Uncut emerald 1 Common 3,098 Uncut ruby 1 Common 4,002 Uncut diamond 1 Uncommon 8,493 Loop half of a key 1 Uncommon 26,385 Tooth half of a key 1 Uncommon 42,768 Uncut dragonstone 1 Rare 17,354 Dragonstone 1 Rare 10,903 Dragon dagger 1 Uncommon 16,714 Rune battleaxe 1 Rare 24,010 Rune javelin 5 Rare 895 Adamant javelin 20 Very rare 1,060 Rune 2h sword 1 Very rare 37,408 Rune spear 1 Very rare 11,186 Dragon spear 1 Very rare 36,682 Dragon dagger 50 (noted) Very rare 835,700 Rune sq shield 1 Very rare 22,425 Rune kiteshield 1 Very rare 31,824 Shield left half 1 Very rare 65,249 Dragon helm 1 Very rare 60,667 Adamant bolts 200 Uncommon 16,800 Onyx bolts 150 Rare 1,250,250 Rune arrow 150–200, 500 Rare 22,500–75,000 Battlestaff 200 (noted) Rare 1,567,800 Air orb 1,000 (noted) Rare 2,922,000 Fire orb 1,000 (noted) Rare 2,356,000 Vecna skull 1 Very rare 146,013 Water talisman 1 Uncommon 11,282 Earth talisman 25–35 (noted) Uncommon 35,150–49,210 Fire talisman 25–35 (noted) Uncommon 69,600–97,440 Chaos talisman 1 Uncommon 195 Nature talisman 1 Uncommon 395 Pure essence 500–15,000 (noted) Uncommon 8,000–240,000 Nature rune 20–80 Rare 6,600–26,400 Soul rune 20 Rare 3,060 Law rune 45 Rare 13,410 Death rune 50, 121 Rare 5,700–13,794 Blood rune 50 Rare 13,500 Raw swordfish 125–250, 1,000 (noted) Uncommon 48,875–391,000 Raw shark 250–500 (noted) Uncommon 443,250–886,500 Big bones 150–500 (noted) Uncommon 83,700–279,000 Coal 150–7,500 (noted) Uncommon 28,350–1,417,500 Adamantite ore 150–800 (noted) Uncommon 425,400–2,268,800 Silver ore 100 (noted) Rare 11,400 Runite ore 100 (noted) Rare 1,057,400 Adamant bar 1,000–7,000 (noted) Rare 3,766,000–26,362,000 Rune bar 1, 50, 150 (noted) Rare 13,146–1,971,900 Clean ranarr 33 (noted) Uncommon 106,293 Clean toadflax 25–250 (noted) Uncommon 101,400–1,014,000 Clean snapdragon 30–120 (noted) Uncommon 112,860–451,440 Clean torstol 10–100 (noted) Uncommon 48,790–487,900 Saradomin brew (4) 250 (noted) Very rare 118,250 Watermelon seed 3 Uncommon 8,100 Yew seed 1–50 Rare 84,710–4,235,500 Magic seed 1–7 Rare 192,980–1,350,860 Palm tree seed 10 Rare 1,253,280 Snapdragon seed 1 Rare 1,952 Torstol seed 1–31 Rare 18,717–580,227 Fellstalk seed 2 Rare 1,488 Yew logs 50–20,000 (noted) Rare 28,250–11,300,000 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.