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

Caustic Wolf

CREATURE 2

UNIQUE MEDIUM ANIMAL

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

Skills Acrobatics +8, Intimidation +8, Stealth +8, Survival +8

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

AC 18; Fort +8, Ref +10, Will +6

HP 30; Immunities acid

Speed 35 feet

Melee Jaws +11 (unarmed), Damage 1d6+2 piercing plus 1d4 acid plus Knockdown

Acid Breath

The wolf unleashes a stream of bright green acid from its mouth, coating all creatures in a 30-foot line. All creatures in the line take 3d6 acid damage (DC 16 basic Reflex save).

The caustic wolf cannot use this ability again for 1 minute.

Howl

The wolf unleashes a terrifying howl, allowing it to Demoralize all enemies within 30 feet. Wolves within 100 feet can spend a reaction to join the howl, causing the effect to emanate from them as well. This affects additional enemies within 30 feet of them and uses the caustic wolf's Intimidation check with a -4 circumstance penalty.

Enemies cannot be affected by the howl more than once, even if they are near more than one howling wolf. All creatures targeted by this effect are temporarily immune for 24 hours.

Knockdown

Requirements The monster's last action was a successful Strike that lists Knockdown in its damage entry

Effect The monster attempts to Trip the creature. This attempt neither applies nor counts toward the monster's multiple attack penalty.

Pathfinder Adventure: The Fall of PlaguestoneOGL