From Pathfinder Adventure: The Fall of Plaguestone, which isn't enabled.

Icy Rat

CREATURE 0

RARE SMALL ANIMAL

Perception +5; low-light vision, scent (imprecise) 30 feet

Skills Acrobatics +5, Athletics +3 (+5 to Climb or Swim), Stealth +7

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

AC 16; Fort +6, Ref +7, Will +3

HP 15; Immunities cold; Weaknesses fire 5

Speed 30 feet, climb 10 feet

Melee Jaws +7 (agile, finesse, unarmed), Damage 1d6+1 piercing plus 1 cold

Icy Death

When an icy rat is slain, its body explodes in a burst of frozen fur and bone, dealing 2d4 cold damage to all adjacent creatures (DC 14 basic Reflex save).

Pathfinder Adventure: The Fall of PlaguestoneOGL