pf2e.fyi
From Pathfinder #157: Devil at the Dreaming Palace, which isn't enabled.

Shredskin

CREATURE 2
Perception +11; darkvision
Languages Common; (can't speak any language)
Skills Acrobatics +10, Athletics +8, Deception +8, Stealth +8
Str +2, Dex +4, Con +0, Int -1, Wis +0, Cha +2

AC 18; Fort +6, Ref +10, Will +8
HP 30; Immunities bleed, critical hits (except slashing), death effects, disease, mental, paralyzed, poison, precision, unconscious

Speed fly 30 feet
Melee Claws +10 (agile), Damage 1d6+4 slashing plus Grab
Melee Jaws +11 (unarmed), Damage 1d8+4 piercing
Compression

When a shredskin successfully Squeezes, it moves through the tight space at full speed. Narrow confines are not difficult terrain for a shredskin.

Constrict

1d4+4 bludgeoning damage, DC 16 basic Fortitude


The monster deals the listed amount of damage to any number of creatures Grabbed or Restrained by it. Each of those creatures can attempt a basic Fortitude save with the listed DC.

Control Body
Requirements The shredskin is adjacent to a Medium or Small humanoid-shaped corpse

Effect The shredskin wraps itself around the corpse and takes control of the host body. While controlling a host, the shredskin uses the host's Speed but its own attacks, and it loses its Grab and Enshroud abilities.

Attacks that target the shredskin while it controls a body deal half of the damage to the shredskin and half of the damage to the host body. Attacks that target an area deal damage to both the shredskin and host body normally.

The shredskin can release the host body as a free action at the start of its turn. If the host is destroyed, the shredskin automatically releases the body and is Off-Guard for 1 round. A Medium corpse typically has 15 hit points, while a Small corpse typically has 10 Hit Points.

Creatures can notice that a corpse is controlled by a shredskin by succeeding a Perception check against the shredskin's Deception DC.

Enshroud
Requirements The shredskin is grabbing a creature

Effect The shredskin attempts to pin the creature and wrap itself around the creature like a shirt. The shredskin rolls an Athletics check against the creature's Fortitude DC.

On a success, the creature becomes Restrained and the shredskin can take control of the creature as if using Control Body.

At the start of its turn, the shredskin can automatically Constrict the enshrouded creature as a free action.

An enshrouded creature can attempt a Escape check to break free (Escape if the shredskin critically succeeded its Athletics check to Enshroud).

Grab

Requirements The monster's last action was a successful Strike that lists Grab in its damage entry, or the monster has a creature Grabbed or Restrained

Effect If used after a Strike, the monster attempts to Grapple the creature using the body part it attacked with. This attempt neither applies nor counts toward the creature's multiple attack penalty.

The monster can instead use Grab and choose one creature it's grabbing or restraining with an appendage that has Grab to automatically extend that condition to the end of the monster's next turn.

Pathfinder #157: Devil at the Dreaming PalaceOGL