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 559
- Represents 90% confidence range, based on a sample of 2,832 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 2,484 Adamant sq shield 1 Common 1,711 Rune dagger 1 Common 4,323 Rune helm 1 Common 10,610 Rune mace 1 Common 7,884 Rune longsword 1 Common 18,379 Royal cape 1 Uncommon 90
Item Quantity Rarity GE Market Price Grimy guam 1 Uncommon 625 Grimy harralander 1 Uncommon 189 Grimy tarromin 1 Uncommon 43 Grimy ranarr 1 Uncommon 2,693 Grimy irit 1 Uncommon 2,526 Grimy avantoe 1 Uncommon 4,460 Grimy kwuarm 1 Uncommon 2,343 Grimy marrentill 1 Uncommon 80 Grimy dwarf weed 1 Rare 10,845 Grimy cadantine 1 Rare 2,003 Grimy lantadyme 1 Rare 9,297
Item Quantity Rarity GE Market Price Cactus seed 1 Uncommon 19 Poison ivy seed 1 Uncommon 1 Avantoe seed 1–2 Uncommon 4,870–9,740 Fellstalk seed 2 Uncommon 1,372 Cadantine seed 1 Uncommon 2,728 Irit seed 1 Uncommon 257 Belladonna seed 1 Uncommon 395 Toadflax seed 1 Uncommon 1,752 Kwuarm seed 1 Rare 312 Snapdragon seed 1 Rare 1,957 Lantadyme seed 1 Very rare 39,676 Torstol seed 1 Very rare 19,661 Dwarf weed seed 1 Very rare 50,590
Item Quantity Rarity GE Market Price Flax 50 (noted) Common 1,700 Runite ore 1 Uncommon 10,485 Adamantite ore 3 (noted) Uncommon 8,901 Royal dragonhide 1 Uncommon 5,831
Item Quantity Rarity GE Market Price Coins 5,000 Common Not sold Shark 2 Common 2,986 Saradomin brew (2) 1 Common 141 Blood rune 10, 50, 100, 150 Common 2,750–41,250 Law rune 10–45 Rare 2,950–13,275 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 1,729 Uncut emerald 1 Common 3,207 Uncut ruby 1 Common 3,929 Uncut diamond 1 Uncommon 8,277 Loop half of a key 1 Uncommon 26,832 Tooth half of a key 1 Uncommon 43,227 Uncut dragonstone 1 Rare 17,444 Dragonstone 1 Rare 10,940 Dragon dagger 1 Uncommon 16,777 Rune battleaxe 1 Rare 24,096 Rune javelin 5 Rare 895 Adamant javelin 20 Very rare 1,020 Rune 2h sword 1 Very rare 37,396 Rune spear 1 Very rare 11,284 Dragon spear 1 Very rare 35,862 Dragon dagger 50 (noted) Very rare 838,850 Rune sq shield 1 Very rare 22,300 Rune kiteshield 1 Very rare 31,320 Shield left half 1 Very rare 64,625 Dragon helm 1 Very rare 60,902 Adamant bolts 200 Uncommon 18,600 Onyx bolts 150 Rare 1,264,800 Rune arrow 150–200, 500 Rare 22,500–75,000 Battlestaff 200 (noted) Rare 1,556,000 Air orb 1,000 (noted) Rare 3,075,000 Fire orb 1,000 (noted) Rare 2,450,000 Vecna skull 1 Very rare 145,761 Water talisman 1 Uncommon 11,876 Earth talisman 25–35 (noted) Uncommon 36,925–51,695 Fire talisman 25–35 (noted) Uncommon 72,750–101,850 Chaos talisman 1 Uncommon 185 Nature talisman 1 Uncommon 388 Pure essence 500–15,000 (noted) Uncommon 8,500–255,000 Nature rune 20–80 Rare 6,780–27,120 Soul rune 20 Rare 2,820 Law rune 45 Rare 13,275 Death rune 50, 121 Rare 5,800–14,036 Blood rune 50 Rare 13,750 Raw swordfish 125–250, 1,000 (noted) Uncommon 50,500–404,000 Raw shark 250–500 (noted) Uncommon 449,250–898,500 Big bones 150–500 (noted) Uncommon 83,850–279,500 Coal 150–7,500 (noted) Uncommon 28,200–1,410,000 Adamantite ore 150–800 (noted) Uncommon 445,050–2,373,600 Silver ore 100 (noted) Rare 11,100 Runite ore 100 (noted) Rare 1,048,500 Adamant bar 1,000–7,000 (noted) Rare 3,974,000–27,818,000 Rune bar 1, 50, 150 (noted) Rare 13,101–1,965,150 Clean ranarr 33 (noted) Uncommon 92,103 Clean toadflax 25–250 (noted) Uncommon 100,550–1,005,500 Clean snapdragon 30–120 (noted) Uncommon 114,180–456,720 Clean torstol 10–100 (noted) Uncommon 53,280–532,800 Saradomin brew (4) 250 (noted) Very rare 112,750 Watermelon seed 3 Uncommon 7,941 Yew seed 1–50 Rare 88,291–4,414,550 Magic seed 1–7 Rare 195,100–1,365,700 Palm tree seed 10 Rare 1,174,250 Snapdragon seed 1 Rare 1,957 Torstol seed 1–31 Rare 19,661–609,491 Fellstalk seed 2 Rare 1,372 Yew logs 50–20,000 (noted) Rare 28,950–11,580,000 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.