From Pathfinder Society Scenario #2-16: Freedom for Wishes, which isn't enabled.

Mephit Swarm (7-8)

CREATURE 5

UNCOMMON LARGE AIR EARTH ELEMENTAL FIRE SWARM WATER

Perception +12; darkvision

Languages Petran, Pyric, Sussuran, Thalassic; (varies by mephit)

Skills Acrobatics +12, Athletics +10, Deception +10

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

AC 21; Fort +10, Ref +12, Will +10

HP 50, fast healing 2; Immunities bleed, paralyzed, poison, precision, sleep, swarm mind; Weaknesses area damage 5, splash damage 5; Resistances physical 5

Fast Healing 2

A monster with this ability regains the given number of Hit Points each round at the beginning of its turn.

Speed 20 feet, fly 25 feet

Breath Weapon (acid, air, arcane, cold, earth, electricity, fire)

The mephit swarm breathes energy in a 15-foot cone that deals 1d10 acid plus 1d10 cold plus 1d10 electricity plus 1d10 fire damage to each creature within the area (DC 22 basic Reflex save).

The mephit swarm can't use Breath Weapon again for 1d4 rounds.

Swarming Claws

Each enemy in the swarm's space takes 3d6 piercing damage (DC 22 basic Reflex save).

Pathfinder Society Scenario #2-16: Freedom for WishesOGL