From Pathfinder #193: Mantle of Gold, which isn't enabled.

Giant Leech

CREATURE 2

Variant Giant Leech

Capable of growing to lengths of nearly 5 feet, giant leeches have circular maws filled with hook-like teeth. They prefer to dwell in stagnant or slow-moving shallow water or in damp, moist undergrowth. Horses and larger animals are their favorite prey, but they won't balk at a chance to latch onto a human- or halfling-sized meal.

Perception +5; tremorsense (imprecise) 30 feet

Skills Athletics +8, Stealth +7

Str +4, Dex +1, Con +3, Int -5, Wis +1, Cha -5

Tremorsense 30 feet

Tremorsense allows a monster to feel the vibrations through a solid surface caused by movement. It is an imprecise sense with a limited range (listed in the ability). Tremorsense functions only if the monster is on the same surface as the subject, and only if the subject is moving along (or burrowing through) the surface.

Parasitizing

While burrowed into Lady Shimmersnip, a giant leech has cover, can't make attacks, and can Squirm. If a giant leech is Grabbed, Restrained, or Stunned, a creature can attempt to remove the leech by spending a single action, which has the attack and manipulate traits, attempting an Athletics or Medicine check against the giant leech's Fortitude DC. On a success, the creature extracts the leech, reduces Lady Shimmersnip's Clumsy condition by 1, and places the leech in a space adjacent to the creature and Lady Shimmersnip.

AC 17; Fort +9, Ref +7, Will +5

HP 32; Weaknesses salt 5

Speed 5 feet, swim 20 feet

Melee Mouth +10, Damage 1d4+6 piercing plus Grab

Blood Drain

Requirements The giant leech has a creature Grabbed or Restrained

Effect The giant leech drains blood from the creature it has grabbed. This deals 2d4 damage. A creature that has its blood drained by a giant leech is Drained 1 until it receives any kind or amount of healing.

Gnash

Frequency once per round

Requirements The giant leech is parasitizing Lady Shimmersnip

Effect Lady Shimmersnip takes 1 slashing that bypasses her resistances.

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 #193: Mantle of GoldOGL