rare ne medium undead 

Perception +15; darkvision

Skills Athletics +26

Str +8 Dex -1 Con +7 Int -5 Wis +0 Cha -2

Slow A sodden sentinel is permanently slowed 1 and can't use reactions.

AC  28; Fort +24, Ref +14, Will +19

HP 320, negative healing; Immunities death effects; Weaknesses positive 15, slashing 15

Tainted Guts When a sodden sentinel is reduced to 0 Hit Points, it explodes, dealing 6d6 bludgeoning damage to each creature in a 10-foot emanation (DC 30 basic Reflex save). A creature that fails this save is also blinded for 1d4 rounds (1 minute on a critical failure).

Speed 25 feet

Melee [>] fist +24, Damage 2d12+16 bludgeoning plus

Improved Knockdown

Pummel the Fallen A sodden sentinel's fist Strike deals an additional 2d6 damage to prone creatures.

Seawater Retch [>>] (necromancy, occult, water) The sodden sentinel vomits up a supernaturally tainted wave of seawater in a 30-foot cone. Each living creature in the area takes 6d10 negative damage (DC 30 basic Reflex save). It can't use Seawater Retch again for 1d4 rounds.

Extinction Curse #4: Siege of the Dinosaurs, page 32.