From Pathfinder #181: Zombie Feast, which isn't enabled.

Scrabbling Ribcage

CREATURE 1

The ribs of a scrabbling ribcage are connected to either a sternum or vertebral column, but not both, allowing the ribs to function as legs.

Commonly mistaken for undead, animated bones are mindless constructs with no connection to necromancy. The following are examples of typical animated bones.

Perception +6; darkvision

Skills Athletics +6

Str +2, Dex +2, Con +2, Int -5, Wis +0, Cha +5

AC 16; Fort +7, Ref +5, Will +5

HP 20; Immunities precision; Weaknesses bludgeoning 3; Resistances cold 3, electricity 3, fire 3, piercing 3, slashing 3

Scrabble

Trigger A creature moves away from the scrabbling ribcage, or a creature Grabbed or Restrained by the scrabbling ribcage Escapes from it

Effect The ribcage Strides or Climbs. This movement doesn't trigger reactions.

Speed 20 feet, climb 20 feet

Melee Jagged Ribs +7, Damage 1d6+2 piercing plus Grab

Constrict

1d8 bludgeoning, DC 17 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.

Skittering Rush

The scrabbling ribcage Strides or Climbs twice, with its Speeds increased by 10 feet for this movement.

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 #181: Zombie FeastOGL