Lava Worm SwarmCreature 5
Source Pathfinder Bestiary 3
Perception +12 (tremorsense (imprecise) 60 feet)
Languages none
Skills Acrobatics +10, Stealth +12
Str -1, Dex +3, Con +4, Int -5, Wis +1, Cha -4
AC 20; Fort +15; Reflex +12; Will +8;
HP 60
Speed 15 feet (burrow 30 feet)
Immunities fire, precision, swarm mind
Weaknesses Area Damage 4, Splash Damage 4, Water 8
Resistances Bludgeoning 4, Piercing 8, Slashing 8
Tremorsense (Imprecise) 60 feet
Tremorsense allows a monster to feel the vibrations through a solid surface caused by movement. It is an imprecise sense with a limited range (listed in the ability). Tremorsense functions only if the monster is on the same surface as the subject, and only if the subject is moving along (or burrowing through) the surface.
Swarm MindThis monster doesn't have a single mind (typically because it's a swarm of smaller creatures), and is immune to mental effects that target only a specific number of creatures. It is still subject to mental effects that affect all creatures in an area.
Swarming Bites
Each enemy in the swarm's space takes 3d6 fire damage (DC 22 reflex save).
Creatures that fail this save become Sickened 1 from the swarm's painful bites.
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.
These Darklands vermin produce corrosive, noxious slime and deliver agonizing bites, whether as a revolting, wriggling swarm of finger-length worms or a single massive, lurching beast. Among Darklands communities, most inhabitants regard bore worms much in the same way surface cultures speak of maggots or cockroaches-with general disdain and revulsion. Children consider catching a single bore worm and using it to torment others a rite of passage, albeit a dangerous one.
Dwelling in the deepest, hottest reaches of the Darklands, these bizarre creatures consume not living matter but minerals and rare earths. They're most often found near volcanoes or open magma and will swim through the lava in pursuit of a meal.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
AnimalAn animal is a creature with a relatively low intelligence. It typically doesn't have an Intelligence attribute modifier over –4, can't speak languages, and can't be trained in Intelligence-based skills.
SwarmA swarm is a mass or cloud of creatures that functions as one monster. Its size entry gives the size of the entire mass, though for most swarms the individual creatures that make up that mass are Tiny. A swarm can occupy the same space as other creatures and must do so in order to use its damaging action. A swarm typically has weakness to effects that deal damage over an area (like area spells and splash weapons). Swarms are immune to the grabbed, prone, and restrained conditions.