pf2e.fyi
From Pathfinder #177: Burning Tundra, which isn't enabled.

Graylok Ambusher

CREATURE 8
UNCOMMONLARGECHAOTICCOLDEVILGIANTHUMANOID
Perception +19; low-light vision
Languages Common, Jotun
Skills Acrobatics +16, Athletics +21, Intimidation +16, Stealth +18 (+22 in snow), Survival +16
Str +5, Dex +3, Con +4, Int +1, Wis +2, Cha +0
Items Hatchet, Breastplate
AC 26; Fort +16, Ref +19, Will +13
HP 130; Immunities cold; Weaknesses fire 10
Deny Advantage

A Graylok ambusher isn't Off-Guard to Hidden, undetected, or flanking creatures of 8th level or lower or creatures of 8th level or lower using sneak attack. However, such creatures can still help other creatures flank.

Opportune Backstab
Trigger A creature within melee reach is hit by a melee attack from one of the Graylok ambusher's allies
Effect The Graylok ambusher attempts a Strike against the triggering creature.
Speed 30 feet
Melee Hatchet +18 (agile, magical, reach 10, sweep, thrown 10), Damage 2d6+9 slashing
Melee Fist +18 (reach 10, unarmed), Damage 2d6+8 bludgeoning
Brutal Beating

When the Graylok ambusher scores a critical hit with a melee Strike, the target is Frightened 1.

Dread Striker

Any creature that has the Frightened condition is Off-Guard against the Graylok ambusher's attacks.

Ice Stride

A frost giant isn't impeded by difficult terrain caused by snow or ice, nor do they need to attempt Acrobatics checks to keep from falling on slippery ice.

Light Step

When the Graylok ambusher Strides or Steps, they ignore difficult terrain.

Sneak Attack

The Graylok ambusher deals an additional 2d6 precision damage to Off-Guard creatures.

Pathfinder #177: Burning TundraOGL