Mature grotworm

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Mature grotworms can be found on the bottom level of the Grotworm Lair. They have slow, but very accurate, magic and melee attacks. However, magic attacks are only used on players outside of melee range, similar to monsters such as metallic 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, Tzhaar-ket-om, 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 a full set of guthan's to heal. Lower-level players are still advised to bring some food if the 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. Some players may find it useful to bring runes to cast High Level Alchemy the items dropped by the grotworms, as Rune armor/weapons are very common drops from them.

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100% Drops

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Weapons

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Armour

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Herbs

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Seeds

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Raw Materials

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Runes

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Potions

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Other

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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 the Dutch language.
 * 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 was released with them.
 * When attacking a Mature Grotworm with Melee, the player's head is completely covered by the Grotworm's.