From Pathfinder Society Scenario #5-04: Necessary Introductions, which isn't enabled.

Bejeweled Rat Swarm

CREATURE 2

Perception +8; low-light vision, scent (imprecise) 30 feet

Skills Acrobatics +9, Athletics +5 (+7 to Climb), Stealth +7 (+9 within treasure)

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

AC 17; Fort +3, Ref +8, Will +5

HP 21; Immunities precision, swarm mind; Weaknesses area damage 5, splash damage 5; Resistances physical 6 (except bludgeoning)

Swarm Mind

This 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.

Speed 30 feet, climb 10 feet

Swarming Bites

Each enemy in the swarm's space takes 1d8 piercing damage (DC 18 basic Reflex save). A creature that fails their saving throw becomes Clumsy 1 for 1 round.

Pathfinder Society Scenario #5-04: Necessary IntroductionsOGL