uncommon ne large aberration swarm 

Perception +21; darkvision, poison sense (precise) [object Object] feet

Skills Acrobatics +21, Crafting +23, Nature +19, Religion +21, Stealth +23

Str +2 Dex +5 Con +4 Int -1 Wis +3 Cha +0

Poison Sense As fefaliath.

AC  30; Fort +21, Ref +24, Will +18

HP 175; Immunities poison, precision, swarm mind; Weaknesses area damage 10, splash damage 10, good 10; Resistances bludgeoning 5, piercing 10, slashing 10

Speed 40 feet, climb 30 feet

Occult Innate Spells DC 30; 6th death knell (×3), vomit swarm; 2nd invisibility (at will)

Swarming Bites [>] Each enemy in the fefaliath swarm's space takes 2d6 piercing damage (DC 27 basic Reflex save) plus fefaliath venom.

Fefaliath Venom (poison, virulent) Saving Throw DC 28 Fortitude; Maximum Duration 6 rounds; Stage 1 4d6 poison and enfeebled 1 (1 round); Stage 2 5d6 poison, clumsy 1, and enfeebled 2 (1 round)

Strength of Thousands #3: Hurricane’s Howl, page 81.