From Pathfinder #207: The Resurrection Flood, which isn't enabled.

Skinslough

CREATURE 4

Perception +12; darkvision

Languages Common, Necril

Skills Athletics +12

Str +5, Dex +2, Con +4, Int +2, Wis +2, Cha -4

AC 20; Fort +14, Ref +8, Will +11

HP 72, hard to target, void healing; Immunities bleed, death effects, disease, paralyzed, poison, unconscious; Weaknesses cold 6; Resistances bludgeoning 6, piercing 6

Hard to Target

With their loose, shifting skin, a skinslough's vital organs are difficult to locate. Each time a skinslough would take precision damage or extra damage from a critical hit, it attempts a DC 5 flat check. On a success, the additional damage is negated.

Slough

Trigger The skinslough gains a persistent damage condition or becomes Grabbed, Immobilized, or Restrained

Effect The skinslough sheds part of its skin and attempts a DC 5 flat check to end the condition.

Void Healing

A creature with void healing draws health from void energy rather than vitality energy. It is damaged by vitality damage and is not healed by vitality healing effects. It does not take void damage, and it is healed by void effects that heal undead.

Speed 25 feet, swim 20 feet

Melee Fist +13 (agile, disarm, unarmed), Damage 2d8+5 bludgeoning plus Sloughing Sickness

Melee Skin Net +13, Damage

Skin Net (attack, disease)

The skinslough interacts to pull off part of its skin and throw it at a creature within 30 feet, making a ranged attack with a +12 modifier. If it hits, the target takes a –10-foot circumstance penalty to its Speeds for 1 round and must make a DC 18 Fortitude save. If the skinslough critically hits, the target gets a result one degree of success worse than the outcome of its Fortitude save.

Effect: Skin Net

Critical Success As success, and the creature automatically succeeds at saving throws against the skinslough's Skin Net for 24 hours.

Success The target is unaffected except for the penalty to Speed.

Failure The target is also Sickened 1.

Critical Failure The target is also Sickened 2.

Sloughing Sickness (disease, void)

This horrifying disease can make a target's skin slough away.

Saving Throw DC 18 Fortitude

Stage 1 carrier with no ill effect (1 hour)

Stage 2 2d4+4 void damage and Clumsy 1 (1 day)

Stage 3 4d4+4 void damage, clumsy 1, and Stupefied 1 (1 day).

Pathfinder #207: The Resurrection FloodORC