From Pathfinder Society Scenario #2-06: The Crashing Wave, which isn't enabled.

Zombie Grindylow

CREATURE 0

UNCOMMON SMALL AMPHIBIOUS EVIL MINDLESS UNDEAD UNHOLY ZOMBIE

Perception +5; darkvision

Skills Athletics +8

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

Slow

A zombie is permanently Slowed 1 and can't use reactions.

AC 13; Fort +6, Ref +2, Will +2

HP 30, void healing; Immunities bleed, death effects, disease, paralyzed, poison, unconscious; Weaknesses vitality 5, slashing 5

Tangling Kelp

Trigger A creature attempts a melee attack against a zombie grindylow with a bludgeoning or slashing weapon

Effect The creature must succeed at a DC 13 Reflex saving throw or become tangled in the kelp that surrounds the zombie grindylow, giving the creature a -10 circumstance penalty to its Speeds until it spends a manipulate action to remove the kelp.

Void Healing

A creature with void healing draws health from void energy rather than vitality energy. It is damaged by vitality damage and is not healed by vitality healing effects. It does not take void damage, and it is healed by void effects that heal undead.

Speed 25 feet

Melee Tentacle +7 (agile, finesse, trip, unarmed), Damage 1d4+2 bludgeoning plus Grab

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 Society Scenario #2-06: The Crashing WaveOGL