Army Ant Swarm

Creature 5

Large
animal
swarm

Perception: +11; darkvision, scent (imprecise) 30 feet
Skills: Athletics +7; Str −2, Dex +4, Con +4, Int −5, Wis +2, Cha −4

AC: 21; Fort +13, Ref +11, Will +9
HP: 55; Immunities precision, swarm mind; Weaknesses area damage 5, splash damage 5; Resistances bludgeoning 2, piercing 5, slashing 5

Swarm Mind

Cling ⟲ Trigger A creature leaves the swarm's space

Effect The swarm takes 1d6 untyped damage as ants cling to the creature and continue biting, dealing 3d6 persistent piercing damage. High winds or immersion in water reduces the DC of the flat check to end this persistent damage to 5. Any area damage dealt to the creature destroys these clinging ants.

Speed: 30 feet, climb 30 feet

Swarming Bites ◆ Each enemy in the swarm's space takes 3d6 piercing damage (DC 21 basic Fortitude save). A creature that fails its save against Swarming Bites becomes Clumsy 1 for 1 round. If the creature attempts a concentrate or manipulate action while affected, it must succeed at a DC 5 Flat or the action is lost; roll the check after spending the action, but before any effects are applied.

Effect: Swarming Bites

Source: Pathfinder Monster Core

Running this fight? Add the army ant swarm to the initiative tracker: type its name and the AC, hit points and Perception for initiative fill in, and the book button shows this stat block mid-fight.