pf2e.fyi
From Pathfinder #167: Ready? Fight!, which isn't enabled.

Grandfather Mantis

CREATURE 15

Yarrika's spirit guardian

Perception +27
Languages Arcadian; telepathy 100 feet
Skills Athletics +28, Occultism +25, Religion +25
Str +5, Dex +5, Con +3, Int +2, Wis +4, Cha +2

AC 36; Fort +26, Ref +30, Will +25
HP 300; Weaknesses force 15, vitality 15

Speed 35 feet, climb 35 feet
Melee Claw +28 (agile, magical, unarmed), Damage 3d10+13 slashing plus Improved Grab
Innate Occult Spells DC 35, attack +27; 5th Shadow Blast, Fly
Mantis Ambush
Trigger A creature within Grandfather Mantis's reach is hit by an ally's melee attack

Effect Grandfather Mantis makes a claw Strike against the triggering creature.
Pounce

Grandfather Mantis Strides, then Strikes.

Improved Grab

Trigger The monster's last action was a successful Strike that lists Improved 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 as a free action. This attempt neither applies nor counts toward the creature's multiple attack penalty.

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

Pathfinder #167: Ready? Fight!OGL