Perception +12; tremorsense (imprecise) 60 feet
Skills Acrobatics +10, Stealth +12
Str –1, Dex +3, Con +4, Int –5, Wis +1, Cha –4
AC 20; Fort +15, Ref +12, Will +8
HP 60; Immunities acid, precision, swarm mind; Weaknesses area damage 4, splash damage 4, water 8; Resistances bludgeoning 4, piercing 8, slashing 8
Speed 15 feet, burrow 30 feet
Swarming Bites Each enemy in the swarm’s space takes 3d6 acid damage (DC 22 basic Reflex save). Creatures that fail this save become sickened 1 from the swarm’s painful bites.
Bore Worm Swarm
A single finger-length bore worm is unpleasant but mostly innocuous. Ten thousand bore worms, on the other hand, pose a formidable threat to even seasoned adventurers. The countless worms form a roiling, rancid mass of acid and pain, capable of delivering a hideous death to any person or beast unable to escape them. Unfortunately for any creature other than a bore worm, most encounters involve swarms.