Vescavor Swarm

Creature 5

Large
fiend
swarm
unholy

Perception: +11; darkvision
Languages: Chthonian
Skills: Acrobatics +13, Athletics +10, Stealth +13; Str −2, Dex +5, Con +4, Int −3, Wis +1, Cha +1

AC: 21; Fort +11, Ref +15, Will +9
HP: 60; Immunities mental, precision; Weaknesses area damage 5, cold iron 5, holy 5, splash damage 5; Resistances bludgeoning 5, piercing 5, slashing 2

Swarm Mind

Speed: 20 feet, fly 40 feet

Devour All ◆◆ The swarm eat away the very earth beneath their feet. The swarms Strides. All squares they occupy during their movement becomes difficult terrain. Any creatures they move through must succeed a DC 21 Reflex save or fall Prone.

Maddening Gibbers ◆◆ (auditory, mental) Each stupefied creature in the swarm's space must attempt a DC 21 Will saving throw as the swarm yammers an endless, maddening chorus.

Critical Success The target is unaffected and is temporarily immune to Maddening Gibbers for 1 minute.

Success The target is unaffected and is immune to Maddening Gibbers for 1 round.

Failure The target becomes Confused for 1 round.

Critical Failure The target becomes confused for 1 round and can't target fiends while confused in this way.

Ravenous Bites ◆ Each enemy in the swarm's space takes 3d6 piercing damage (DC 20 basic Fortitude save). A creature that fails its save is also Stupefied 1 for 1 round.

Source: Pathfinder Monster Core

Running this fight? Add the vescavor 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.