Mature grotworm

Mature Grotworm can be found on the bottom level of the Grotworm Lair. They use slow, but very accurate magic and melee attacks. It is possible to safespot them using the pillars if you stand far enough back from them. As they are weak to stabbing and slashing attacks, weapons such as a Chaotic Rapier or Abyssal whip are good choices. Protecting from melee would work best for up close fighting. Far away combat would require protect from magic.

Melee
Meleeing is the common way to kill grotworms, as they have a very low crush and low stab defence and mediocre slash defence. However, these grotworms will immediately launch a magic attack at anyone charging at them, making magic protection prayers necessary. However they are still pretty easy to kill with melee and good stats.


 * Helm: Full slayer helm/Black mask (task) > Torva full helm > Ganodermic visor > Helm of Neitiznot > Torag's helm
 * Body: Torva platebody > Bandos chestplate > Ganodermic poncho > Torag's platebody > Dragon chainbody
 * Amulet: Amulet of fury > Amulet of glory
 * Legs: Torva platelegs > Bandos tassets > Ganodermic leggings > Torag's platelegs > Dragon platelegs/Dragon plateskirt
 * Shield: Dragon Defender > Dragonfire Shield > Chaotic Kiteshield
 * Boots: Steadfast boots > Dragon boots > Bandos boots
 * Cape: Completionist cape > Max cape > TokHaar-Kal > Fire Cape > Soul Wars Cape > Cape of Accomplishment
 * Ring: Onyx Ring (i) > Berserker Ring (i) > Dragonstone Ring (i) > Berserker Ring > TokKul-Zo > Ring of wealth > Ring of life
 * Gloves: Goliath Gloves > Barrows Gloves
 * Aura:
 * Weapon: Chaotic longsword > Chaotic rapier > Abyssal whip > Brackish blade > Dragon scimitar

Inventory If using prayer armor, swap for 8-12 prayer potions and the best prayer bonuses you can use.
 * 16-20 pieces high level food
 * Emergency teleport
 * BoB
 * If using a BoB pouch, fill at least half of the inventory with food unless using anything below a Bull ant.

Ranged
Ranging is a safe way to deal with these grotworms. Their magic attack has a low attack range, similar to Waterfiends, allowing players to make almost any safespot in their habitat, as long as they cannot move around it.


 * Helm: Full slayer helm /Focus sight (slayer task) > Pernix coif > Armadyl helmet > Karil's coif > Archer's helm
 * Body: Pernix body > Armadyl chestplate > Karil's top > Black d'hide body
 * Amulet: Amulet of ranging > Amulet of fury > Amulet of glory
 * Legs: Pernix chaps > Armadyl chainskirt > Karil's skirt > Black d'hide chaps
 * Gloves: Swift Gloves > Barrows Gloves
 * Boots: Glavien boots > Ranger boots > Snakeskin boots
 * Offhand: Eagle-eye kiteshield > Zamorak's unholy book
 * Weapon: Zaryte bow > Chaotic crossbow > Rune crossbow
 * Bolts: Broad-tipped bolts > Runite bolts
 * Cape: Completionist cape > Ava's devices > Arrowstorm drape
 * Ring: Archer's Ring (i) > Onyx Ring (i) > Dragonstone Ring (i) > TokKul-Zo
 * Aura:

Inventory
 * 12-14 Prayer potions (optional)
 * Emergency teleport
 * BoB pouch
 * If using a BoB, fill it with a quarter or a third of items it can hold, as you will not be taking as much damage as needed.

100% drop

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Weapons

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Armour

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Herbs

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Seeds

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Materials

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Potions

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Other

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Trivia

 * When this update first came out the rare drops did not come with it, Jagex decided to wait for the Queen Black Dragon update to release these.
 * "Monster drop tables will be expanded to include items related to the new, draconic armour mentioned in May’s Behind the Scenes."
 * The word 'grotworm' means caveworm in the Dutch language.
 * Even after the update, bonecrushers seem not to be working on the big bones drops from these monsters, this bug has not yet been fixed.
 * Their examine text hints at another, stronger, grotworm based creature, although likely not an actual worm as "metamorphosis" implies, but none was released with them.