n medium earth elemental water 

Perception +9; darkvision

Languages Terran

Skills Athletics +8, Stealth +6

Str +4 Dex +0 Con +3 Int -2 Wis +3 Cha +0

Muddy Field (aura) 10 feet. The ground in the area is difficult terrain for all non-mudwretch creatures.

AC  16; Fort +11, Ref +4, Will +9

HP 40; Immunities bleed, poison, critical hits, paralyzed, sleep; Weaknesses fire 5; Resistances acid 3, physical 3 (except bludgeoning)

Susceptible to Desiccation If a mudwretch takes any damage from horrid wilting or a similar effect, takes 10 or more fire damage from a single effect, or spends more than 24 hours outside of a source of sufficient hydration (such as a swamp, river, well, or recent rainfall), it becomes dehydrated. While dehydrated, the mudwretch can't Spew Mud, is sickened 2, and is slowed 1 until it either fully immerses in water, spends 1 minute in the rain, or rehydrates in another way (such as via Gory Hydration).

Speed 20 feet, swim 20 feet

Melee [>] fist +10 (agile), Damage 1d8+4 bludgeoning plus Grab

Constrict [>] 1d8+2 bludgeoning, DC 18

Gory Hydration [R] Trigger The mudwretch deals Constrict damage to a living creature that has blood; Requirements The mudwretch is dehydrated; Effect The mudwretch squeezes harder, dealing 1d6 persistent bleed damage to the target. The mudwretch absorbs this blood, removing any penalties it had as a result of being dehydrated.

Mud Puddle [>] (concentrate) Until it next acts, the mudwretch appears to be an ordinary puddle of mud. It has an automatic result of 20 on Deception checks to pass as a mud puddle and can make a fist Strike against a creature that walks onto the mud puddle as a reaction.

Spew Mud [>>] (conjuration, primal) The mudwretch spews a 20-foot line of pressurized mud that deals 2d10 bludgeoning damage (DC 18 basic Reflex save). On a critical failure, a creature also takes a –10-foot status penalty to its Speeds for 1 round. The mudwretch can't Spew Mud again for 1d4 rounds.

Bestiary 2, page 176.