Rot Grub, Giant

This twitching, pale maggot is the size of a large dog. A circular mouth quivers and gasps at one end of its pulsating body.

Giant Rot Grub CR 3

XP 800
N Small vermin
Init +1; Senses blindsense 30 ft.; Perception +0


AC 15, touch 12, flat-footed 14 (+1 Dex, +3 natural, +1 size)
hp 34 (4d8+16)
Fort +8, Ref +2, Will +1
Immune mind-affecting effects


Speed 20 ft.
Melee bite +6 (1d6+3 plus poison and grab)
Special Attacks gnaw, grab (Medium)


Str 14, Dex 12, Con 18, Int —, Wis 10, Cha 1
Base Atk +3; CMB +4 (+8 grapple); CMD 15


Gnaw (Ex)

A rot grub that is grappling a foe and chooses to damage the foe with an additional grapple check deals twice its normal bite damage (2d6+6 for most giant rot grubs), in addition to injecting an additional dose of poison with each successful check.

Poison (Ex)

Bite—injury; save Fort DC 16; frequency 1/round for 5 rounds; effect 1d3 Str; cure 1 save.


Environment any
Organization solitary, pair, or nest (3-8)
Treasure none

Rot grubs are foul, nauseating parasites that feed on flesh and use corpses as nests in which to grow. While a rot grub can derive nourishment from dead flesh, its true hunger is for the flesh of the living. In some cases, a rot grub continues to feed and grow, eventually reaching enormous size as a venomous giant rot grub. At this size, the rot grub ceases its parasitic behavior and functions more like a predator, scouring the region for living creatures to feed upon.

Although it proves notoriously difficult to predict what circumstances might lead to the growth of a giant rot grub, many seem to arise from swarms allowed to feed upon the flesh of dragons, be they true wyrms or other breeds. While these giants can’t be trusted to arise from every draconic meal a rot grub swarm ingests, the frequency with which they do proves statistically higher.

Section 15: Copyright Notice

Pathfinder Roleplaying Game Bestiary 3, © 2011, Paizo Publishing, LLC; Authors Jesse Benner, Jason Bulmahn, Adam Daigle, James Jacobs, Michael Kenway, Rob McCreary, Patrick Renie, Chris Sims, F. Wesley Schneider, James L. Sutter, and Russ Taylor, based on material by Jonathan Tweet, Monte Cook, and Skip Williams.

PAP25. Copyright 2009, Paizo Publishing, LLC; Author: Sean K Reynolds

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