From Pathfinder #178: Punks in a Powder Keg, which isn't enabled.

Rust Ooze

CREATURE 3

Urban pollution breeds all kinds of new and interesting ooze creatures.

These reddish-brown globs wriggle through sewers and other waterways in search of iron pipes, metal trash, and other objects that rust.

Perception +6; motion sense 60 feet

Skills Athletics +9, Stealth +5 (+7 in areas of rusty objects)

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

Motion Sense 60 feet

A rust ooze can sense nearby creatures through vibration and air or water movement.

AC 11; Fort +10, Ref +3, Will +6

HP 80; Immunities critical hits, precision, unconscious, visual; Weaknesses electricity 5; Resistances metal 5

Corrode Weapon

Trigger The rust ooze is hit with a metal weapon

Effect The rust ooze deals 2d6 acid damage to the item, ignoring its Hardness.

Metal Resistance

A rust ooze has resistance 5 to metal weapons.

Speed 15 feet, swim 30 feet

Melee Pseudopod +11 (unarmed), Damage 1d6+5 bludgeoning plus Rust plus Tetanus

Rust

When a rust ooze critically succeeds at a pseudopod Strike, it deals 2d6 acid damage to a metal item the target is wearing or holding, ignoring the item's Hardness. If a creature uses the Shield Block reaction with a metal shield against a rust ooze's pseudopod attack, the shield is automatically broken, but no other item is rusted.

Tetanus (disease)

An infection introduced through open wounds, tetanus can produce stiffness, muscle spasms strong enough to break bones, and ultimately death.

Saving Throw DC 14 Fortitude

Onset 10 days

Stage 1 Clumsy 1 (1 week)

Stage 2 Clumsy 2 and can't speak (1 day)

Stage 3 Paralyzed with spasms (1 day)

Stage 4 death

Pathfinder #178: Punks in a Powder KegOGL