From Pathfinder Society Scenario #3-10: Delve the Pallid Depths, which isn't enabled.

Sulfuric Slime

CREATURE 1

UNCOMMON MEDIUM MINDLESS OOZE

Perception +4; motion sense 60 feet

Skills Stealth +2 (+5 in water or mud)

Str +0, Dex -3, Con +2, Int -5, Wis +1, Cha -5

Motion Sense 60 feet

A sulfuric slime can sense nearby motion through vibration and air movement.

AC 10; Fort +7, Ref +2, Will +4

HP 30; Immunities acid, critical hits, precision, unconscious, visual

One With the Mud

Trigger The slime takes piercing or slashing damage while touching water or mud

Effect The slime temporarily shrinks in size as part of its body seeps out through its wounds. It thrashes in the nearby sludge, making it more difficult to determine where the boundaries of its body end. It becomes Concealed and gains a +2 circumstance bonus to its AC until the beginning of its next turn.

Speed 10 feet, swim 10 feet

Ranged Sulfur Spout +8 (range increment 10 feet), Damage 1d4 bludgeoning plus 1d6 acid

Pathfinder Society Scenario #3-10: Delve the Pallid DepthsOGL