Release date | 22 May 2012 (Update) | |||||||||||||||||||||||||||||||||||||||||||||||
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Members | Yes | |||||||||||||||||||||||||||||||||||||||||||||||
Combat level | 98 | |||||||||||||||||||||||||||||||||||||||||||||||
XP per kill | 661 (and 218.1 experience) | |||||||||||||||||||||||||||||||||||||||||||||||
Examine text | The final stage of a grotworm before its metamorphosis. | |||||||||||||||||||||||||||||||||||||||||||||||
Slayer info | ||||||||||||||||||||||||||||||||||||||||||||||||
Slayer level | 1 | |||||||||||||||||||||||||||||||||||||||||||||||
Slayer XP | 343.5 | |||||||||||||||||||||||||||||||||||||||||||||||
Assigned by | Turael or Spria, Mazchna or Achtryn, Chaeldar, Sumona, Vannaka, Duradel or Lapalok, Kuradal, Morvran | |||||||||||||||||||||||||||||||||||||||||||||||
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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.
Drops
100% drop
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Charms
Item | Quantity | Rarity | GE price | |
---|---|---|---|---|
Big bones | 1 | Always | 203 |
No charm | ||||
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87–88% | 3% | 1–2% | 8–9% | 0.5–0.7% |
Represents a 90% confidence range based on a sample of 14,187 kills. 1 charm is dropped at a time. Add data to the log (requires JavaScript). |
Weapons and Armour
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Herbs
Item | Quantity | Rarity | GE price | |
---|---|---|---|---|
Adamant chainbody | 1 | Common | 7,111 | |
Adamant sq shield | 1 | Common | 5,225 | |
Rune dagger | 1 | Common | 4,141 | |
Rune helm | 1 | Common | 10,533 | |
Rune mace | 1 | Common | 7,165 | |
Rune longsword | 1 | Common | 17,883 | |
Royal cape | 1 | Rare | 723 |
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Seeds
Item | Quantity | Rarity | GE price | |
---|---|---|---|---|
Grimy guam | 1 | Uncommon | 709 | |
Grimy marrentill | 1 | Uncommon | 2,307 | |
Grimy tarromin | 1 | Uncommon | 105 | |
Grimy harralander | 1 | Uncommon | 741 | |
Grimy ranarr | 1 | Rare | 1,860 | |
Grimy irit | 1 | Rare | 5,008 | |
Grimy avantoe | 1 | Rare | 1,043 | |
Grimy kwuarm | 1 | Rare | 11,782 | |
Grimy cadantine | 1 | Very rare | 4,322 | |
Grimy lantadyme | 1 | Very rare | 7,551 | |
Grimy dwarf weed | 1 | Very rare | 8,476 |
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- ^ No anagogic ort is dropped along this drop.
Raw Materials
Item | Quantity | Rarity | GE price | |
---|---|---|---|---|
Fellstalk seed[1] | 2 | Common | 1,450 | |
Belladonna seed | 1 | Rare | 1,007 | |
Cactus seed | 1 | Rare | 1,016 | |
Poison ivy seed | 1 | Rare | 302 | |
Toadflax seed | 1 | Uncommon | 9,872 | |
Irit seed | 1 | Rare | 1,018 | |
Avantoe seed | 1 | Rare | 375 | |
Kwuarm seed | 1 | Rare | 12,857 | |
Snapdragon seed | 1 | Very rare | 293 | |
Cadantine seed | 1 | Very rare | 1,438 | |
Lantadyme seed | 1 | Very rare | 726 | |
Dwarf weed seed | 1 | Very rare | 822 | |
Torstol seed | 1 | Very rare | 540 |
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Other
Item | Quantity | Rarity | GE price | |
---|---|---|---|---|
Flax | 50 (noted) | Common | 4,800 | |
Runite ore | 1 | Common | 1,419 | |
Adamantite ore | 3 (noted) | Common | 681 | |
Royal dragonhide | 1 | Uncommon | 4,332 |
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Rare drop table drops
- This monster has access to the rare drop table.
Luck-enhancing items such as a ring of wealth or luck of the dwarves are not required to access the table.
Item | Quantity | Rarity | GE price | |
---|---|---|---|---|
Coins | 5,000 | Common | 5,000 | |
Saradomin brew (2) | 1 | Common | 9,136 | |
Shark | 2 | Common | 3,866 | |
Blood rune | 20 | Common | 13,560 | |
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 |
Show/hide rare drop table | ||||
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Item | Quantity | Rarity | GE price | |
Coins | 250–500 | Common | 250–500 | |
Uncut sapphire | 1 | Common | 809 | |
Uncut emerald | 1 | Common | 2,555 | |
Uncut ruby | 1 | Common | 1,842 | |
Uncut diamond | 1 | Common | 4,843 | |
Uncut diamond | 45–55 (noted) | Rare | 217,935–266,365 | |
Loop half of a key | 1 | Common | 11,053 | |
Tooth half of a key | 1 | Common | 11,538 | |
Uncut dragonstone | 1 | Uncommon | 12,077 | |
Uncut dragonstone | 45–55 (noted) | Rare | 543,465–664,235 | |
Dragon longsword | 1 | Common | 56,212 | |
Dragon spear | 1 | Rare | 35,861 | |
Battlestaff | 180–220 (noted) | Rare | 542,160–662,640 | |
Rune javelin | 5 | Rare | 905 | |
Rune platebody | 1 | Uncommon | 37,480 | |
Rune platebody | 15–25 (noted) | Rare | 562,200–937,000 | |
Shield left half | 1 | Rare | 64,399 | |
Dragon helm | 1 | Uncommon | 58,601 | |
Rune arrowheads | 113–137 | Common | 14,916–18,084 | |
Onyx bolts | 135–165 | Very rare | 1,003,725–1,226,775 | |
Chaos talisman | 1 | Rare | 1,923 | |
Nature talisman | 1 | Rare | 1,473 | |
Water talisman | 65–82 (noted) | Rare | 164,320–207,296 | |
Earth talisman | 65–82 (noted) | Rare | 12,025–15,170 | |
Fire talisman | 25–35 (noted) | Rare | 5,225–7,315 | |
Raw lobster | 135–165 (noted) | Common | 47,655–58,245 | |
Raw shark | 225–275 (noted) | Uncommon | 321,075–392,425 | |
Big bones | 68–82 (noted) | Uncommon | 13,804–16,646 | |
Dragon bones | 180–220 (noted) | Rare | 384,480–469,920 | |
Coal | 200–1,100 (noted) | Uncommon | 22,400–123,200 | |
Gold ore | 90–110 (noted) | Common | 52,830–64,570 | |
Adamantite ore | 180–220 (noted) | Uncommon | 40,860–49,940 | |
Adamant bar | 14–16 (noted) | Common | 24,654–28,176 | |
Adamant bar | 135–165 (noted) | Rare | 237,735–290,565 | |
Runite ore | 90–110 (noted) | Rare | 127,710–156,090 | |
Rune bar | 3 (noted) | Common | 8,955 | |
Rune bar | 45–55 (noted) | Rare | 134,325–164,175 | |
Grimy torstol | 90–110 (noted) | Uncommon | 485,010–592,790 | |
Grimy snapdragon | 90–110 (noted) | Uncommon | 161,010–196,790 | |
Super restore (4) | 45–55 (noted) | Uncommon | 125,910–153,890 | |
Prayer potion (4) | 45–55 (noted) | Uncommon | 130,950–160,050 | |
Lantadyme seed | 14–16 | Uncommon | 10,164–11,616 | |
Dwarf weed seed | 14–16 | Uncommon | 11,508–13,152 | |
Magic seed | 4 | Uncommon | 209,856 | |
Palm tree seed | 10 | Rare | 396,000 | |
Flax | 450–550 (noted) | Common | 43,200–52,800 | |
Molten glass | 45–55 (noted) | Common | 27,585–33,715 | |
Soft clay | 450–550 (noted) | Uncommon | 188,550–230,450 | |
Yew logs | 68–82 (noted) | Uncommon | 11,356–13,694 | |
Yew logs | 675–825 (noted) | Rare | 112,725–137,775 | |
Teak plank | 45–55 (noted) | Uncommon | 16,740–20,460 | |
Mahogany plank | 270–330 (noted) | Rare | 356,670–435,930 | |
Blurberry Special | 1 | Uncommon | 12,008 | |
Vecna skull | 1 | Very rare* | 124,871 | |
Hazelmere's signet ring | 1 | Very rare* | 1,432,268,388 | |
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 | |
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
- Universal drops are dropped by nearly every monster outside of Daemonheim.
- These drops are dropped alongside main drops.
Item | Quantity | Rarity | GE price | |
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Key token | 1 | Rare | Not sold | |
Mimic kill token | 1 | Very rare | 5,575 |
Trivia
- 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.