Mature grotworm

Mature grotworm can be found on the bottom level of the Grotworm Lair. They use 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 Stab, use weapons such as a Chaotic Rapier or Korasi's Sword, however, an Abyssal whip with decent combat stats will suffice. With attention, it is possible to gain anywhere from 250-300k gp per hour. (May be weak to Slash, testing needed) chaotic staff owns. best to kill with fire surge

100% drop

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Charms
Crimson Charms 1/20 kills
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Weapons

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Armour

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Herbs

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Seeds

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Other

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Trivia

 * The word 'grotworm' means caveworm in the Dutch language.
 * After the update, bonecrushers seemed 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 creature, but none was released with them.