Mature grotworm

This article is about level 167 Grotworms. For other types of Grotworms, see Grotworm (disambiguation).

This article has a strategy guide here.

Mature grotworm

Release date	22 May 2012 (Update)
Members?	Yes
Combat level	167
Life points	2000
Experience for killing	800 (267 Constitution experience)
Slayer level	Level 1
Slayer XP	205
Assigned by	Turael or Spria, Mazchna or Achtryn, Chaeldar, Sumona, Vannaka, Duradel or Lapalok, Kuradal
Aggressive?	Yes
Poisonous?	No
Immune to poison?	No
Attack style	Magic, Melee
Attack speed
Max hit	164 (melee), 169 (magic)
Weakness	stab > crush > rangedstab > crush > rangedstab > crush > rangedstab > crush > rangedstab > crush > rangedstab > crush > rangedstab > crush > [[]]stab > crush > rangedstab > crush > ranged[[]] > crush > rangedstab > [[]] > rangedstab > crush > rangedStab > Crush > Ranged
Always drops	Big bones
Examine text	The final stage of a grotworm before its metamorphosis.

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Mature grotworms are monsters that can be found on the bottom level of the Grotworm Lair. They have slow, but extremely accurate, 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. As they are weak to crush and stab, the chaotic maul, goliath gloves, and chaotic rapier are good choices. Protect from Melee/Deflect Melee would work best for up-close fighting. An excellent alternative to prayer is to use Guthan's set to heal. Lower-level players are recommended to bring high healing food such as monkfish or sharks if Guthan's healing effect fails to occur. 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.

If a player tries to setup a cannon within the Grotworm Lair a message will be visible in the console saying; The damp air would prevent your cannon operating.

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.

Drops

100% Drops

	Item	Quantity	Rarity	GE Market Price
	Big bones	1	1 Always	351

Weapons

	Item	Quantity	Rarity	GE Market Price
	Rune dagger	1	2 Common	4,562
	Rune mace	1	2 Common	8,420
	Rune longsword	1	2 Common	18,916
	Adamant scimitar	1	4 Rare	1,489
	Adamant battleaxe	1	5 Very rare	2,407
	Adamant 2h sword	1	5 Very rare	3,665

Armour

	Item	Quantity	Rarity	GE Market Price
	Rune helm	1	2 Common	11,283
	Adamant chainbody	1	2 Common	2,717
	Adamant sq shield	1	2 Common	2,152
	Royal cape	1	4 Rare	220

Herbs

	Item	Quantity	Rarity	GE Market Price
	Grimy guam	1	3 Uncommon	521
	Grimy harralander	1	3 Uncommon	385
	Grimy tarromin	1	3 Uncommon	56
	Grimy ranarr	1	3 Uncommon	3,508
	Grimy irit	1	3 Uncommon	1,496
	Grimy avantoe	1	3 Uncommon	2,877
	Grimy kwuarm	1	3 Uncommon	2,902
	Grimy dwarf weed	1	3 Uncommon	7,525
	Grimy marrentill	1	4 Rare	41
	Grimy cadantine	1	4 Rare	1,336
	Grimy lantadyme	1	4 Rare	6,002

Seeds

	Item	Quantity	Rarity	GE Market Price
	Cactus seed	1	3 Uncommon	20
	Poison ivy seed	1	3 Uncommon	31
	Avantoe seed	1–2	3 Uncommon	1,306–2,612
	Dwarf weed seed	1	3 Uncommon	43,732
	Fellstalk seed	2	3 Uncommon	2,052
	Cadantine seed	1	3 Uncommon	997
	Irit seed	1	3 Uncommon	100
	Belladonna seed	1	3 Uncommon	29
	Toadflax seed	1	3 Uncommon	989
	Kwuarm seed	1	4 Rare	1,042
	Lantadyme seed	1	5 Very rare	28,328
	Torstol seed	1	5 Very rare	274,040

Raw Materials

	Item	Quantity	Rarity	GE Market Price
	Flax	50 (noted)	2 Common	3,550
	Runite ore	1	3 Uncommon	10,671
	Adamantite ore	3 (noted)	3 Uncommon	4,965
	Royal dragonhide	1	4 Rare	6,547

Other

	Item	Quantity	Rarity	GE Market Price
	Coins	2000, 3000, 5000, 7000	2 Common	Not sold
	Shark	2	2 Common	1,050
Saradomin brew (2)	Saradomin brew (2)	1	2 Common	1,689
	Anagogic ort	20	3 Uncommon	Not sold
	Blood rune	10,50	3 Uncommon	1,950–9,750
	Rune bar	1	3 Uncommon	13,029
	Law rune	10–45	4 Rare	1,490–6,705
	Long bone	1	4 Rare	Not sold
	Curved bone	1	4 Rare	Not sold
	Spin ticket	1	4 Rare	Not sold
	Clue scroll (hard)	1	4 Rare	Not sold
	Court summons	1	5 Very rare	Not sold
	Starved ancient effigy	1	5 Very rare	Not sold

Rare drop table drops

This monster drops items from the rare drop table.
The ring of wealth improves the chances if equipped but is not required to access the table.

	Show/hide rare drop table
Item Quantity Rarity GE Market Price Coins 250; 381; 450; 3,000; 9,000; 12,000 2 Common Not sold Uncut sapphire 1 2 Common 810 Uncut emerald 1 2 Common 1,295 Uncut ruby 1 2 Common 2,613 Loop half of a key 1 3 Uncommon 9,402 Tooth half of a key 1 3 Uncommon 12,758 Uncut diamond 1 3 Uncommon 9,520 Uncut dragonstone 1 4 Rare 13,572 Dragonstone 1 4 Rare 10,393 Dragon dagger 1 2 Common 17,356 Rune javelin 5 4 Rare 1,285 Adamant javelin 20 5 Very rare 800 Rune spear 1 5 Very rare 12,130 Dragon spear 1 5 Very rare 40,021 Dragon dagger 50 (noted) 5 Very rare 867,800 Rune kiteshield 1 5 Very rare 34,977 Shield left half 1 5 Very rare 65,553 Dragon helm 1 5 Very rare 60,107 Adamant bolts 200 3 Uncommon 31,600 Rune arrow 150–200, 500 4 Rare 28,500–95,000 Onyx bolts 150 4 Rare 1,315,350 Battlestaff 200 (noted) 4 Rare 1,612,200 Air orb 1000 (noted) 4 Rare 1,216,000 Fire orb 1000 (noted) 4 Rare 1,406,000 Vecna skull 1 5 Very rare 457,724 Water talisman 1 3 Uncommon 4,485 Earth talisman 25–35 (noted) 3 Uncommon 20,650–28,910 Fire talisman 25–35 (noted) 3 Uncommon 48,450–67,830 Chaos talisman 1 3 Uncommon 137 Nature talisman 1 3 Uncommon 165 Pure essence 500–15000 (noted) 3 Uncommon 53,500–1,605,000 Template:ExchangeItemNat Nature rune 47–77 4 Rare – Soul rune 20 4 Rare 6,360 Death rune 50, 121 4 Rare 9,250–22,385 Blood rune 50 4 Rare 9,750 Raw swordfish 125 – 250, 1000 (noted) 3 Uncommon 37,875–303,000 Raw shark 250–500 (noted) 3 Uncommon 129,750–259,500 Big bones 150 – 500 (noted) 3 Uncommon 52,650–175,500 Coal 150–7500 (noted) 3 Uncommon 39,450–1,972,500 Adamantite ore 150–800 (noted) 3 Uncommon 248,250–1,324,000 Silver ore 100 (noted) 4 Rare 9,200 Adamant bar 1000–7000 (noted) 4 Rare 2,175,000–15,225,000 Runite ore 100 (noted) 4 Rare 1,067,100 Rune bar 1,50,150 (noted) 4 Rare 13,029–1,954,350 Clean ranarr 33 (noted) 3 Uncommon 115,665 Clean toadflax 25–250 (noted) 3 Uncommon 69,100–691,000 Clean snapdragon 30–120 (noted) 3 Uncommon 168,210–672,840 Clean torstol 10–100 (noted) 3 Uncommon 277,960–2,779,600 Saradomin brew (4) 250 (noted) 5 Very rare 854,750 Watermelon seed 3 3 Uncommon 5,583 Yew seed 1–50 4 Rare 84,903–4,245,150 Magic seed 1–6 4 Rare 294,483–1,766,898 Palm tree seed 10 4 Rare 1,219,220 Snapdragon seed 1 4 Rare 26,078 Torstol seed 1–31 4 Rare 274,040–8,495,240 Fellstalk seed 2 4 Rare 2,052 Yew logs 100–20000 (noted) 4 Rare 49,400–9,880,000

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.
• 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.