n medium mindless ooze 

Perception +14; motion sense 60 feet, no vision

Skills Athletics +23

Str +6 Dex -5 Con +5 Int -5 Wis +0 Cha -5

Motion Sense A tallow ooze can sense nearby motion through vibration and air movement.

AC  19; Fort +22, Ref +10, Will +13

HP 270; Immunities acid, mental, piercing, precision, slashing, critical hits; Weaknesses fire 10; Resistances cold 10

Congealed Whenever the tallow ooze takes fire damage, it becomes quickened for 1 round (it can only Stride or Strike with the extra action). Whenever the tallow ooze is dealt cold damage (even if that damage is prevented by its resistance), it becomes slowed 1 for 1 round and can't use its Engulf ability (but creatures already engulfed are still engulfed).

Greasy Seepage (aura) 10 feet. Any creature that starts its turn in or enters a square in the area must attempt a DC 30 Acrobatics check to Balance. A creature that takes a Step doesn't need to roll this check.

Speed 20 feet, swim 20 feet

Melee [>] pseudopod +23, Damage 2d10+10 bludgeoning plus residual grease

Engulf [>>] DC 30, 4d10 bludgeoning, Escape DC 26, Rupture 25.

Residual Grease When the tallow ooze critically succeeds at an attack against a creature or a creature escapes from being engulfed by the ooze, that creature's hands and gear become slick with grease. For 1d4 rounds, the affected creature must attempt a DC 30 Reflex save whenever it uses any item (including weapons) that must be wielded or held. On a failure, the creature takes a –2 circumstance penalty to any attack roll or check to use the item; on a critical failure, the creature drops the item, which lands in a random adjacent square. The creature (or an adjacent ally) can use 1 Interact action to wipe off the grease from an item or from its hands.

Extinction Curse #4: Siege of the Dinosaurs, page 83.