From Pathfinder Society Scenario #2-04: Path of Kings, which isn't enabled.

Frostbitten Trollhound

CREATURE 2

UNCOMMON MEDIUM BEAST TROLL

Perception +4; darkvision, scent (imprecise) 30 feet

Skills Acrobatics +4, Athletics +9, Stealth +6, Survival +4

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

AC 15; Fort +12, Ref +6, Will +4

HP 50, regeneration 10 (deactivated by acid or fire); Weaknesses fire 10

Regeneration 10 (Deactivated by Acid or Fire)

This monster regains the listed number of Hit Points each round at the beginning of its turn. Its Dying condition never increases beyond Dying 3 as long as its regeneration is active. However, if it takes damage of a type listed in the regeneration entry, its regeneration deactivates until the end of its next turn. Deactivate the regeneration before applying any damage of a listed type, since that damage might kill the monster by bringing it to Dying 4.

Speed 35 feet

Melee Jaws +9 (unarmed), Damage 1d12+2 piercing plus Bloodfire Fever plus Knockdown

Bloodfire Fever (disease)

Saving Throw DC 16 Fortitude

Stage 1 carrier with no ill effect (1 day)

Stage 2 Enfeebled 1 (1 day)

Stage 3 Enfeebled 1 and Clumsy 1 (1 day)

Stage 4 Enfeebled 2 and Clumsy 2 (1 day)

Stage 5 Enfeebled 2, Clumsy 2, and Fatigued (1 day)

Pack Attack

The frostbitten trollhound deals an extra 1d4 damage to creatures within reach of at least two of its allies.

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 Society Scenario #2-04: Path of KingsOGL