GRAY OOZE

A gray ooze is a thick puddle of gray sludge, roughly 8 inches and up to 12 feet across, that closely resembles wet stone or an amorphous rock formation.
When one of these creatures reaches an exceptionally large size they are known to mildly develop greater intellect.
These creatures can corrode metal, though its acids cannot eat through stone or wood.

GRAY OOZE

Medium ooze, unaligned

Armor Class 8

Hit Points 22 ( 3d8+9 )

Speed 10ft Climb: 10ft

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STR

12 +1

DEX

6 -2

CON

16 +3

INT

1 -5

WIS

6 -2

CHA

2 -4

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Skills Stealth +2

Damage Resistances acid, cold, fire

Condition Immunities blinded, charmed, deafened, exhaustion, frightened, prone

Senses blindsight 60 ft. (blind beyond this radius), passive Perception 8

Languages -

Challenge 1/2

Amorphous. The ooze can move through a space as narrow as 1 inch wide without squeezing.
Corrode Metal. Any nonmagical weapon made of metal that hits the ooze corrodes. After dealing damage, the weapon takes a permanent and cumulative -1 penalty to damage rolls. If its penalty drops to -5, the weapon is destroyed. Nonmagical ammunition made of metal that hits the ooze is destroyed after dealing damage. The ooze can eat through 2-inch-thick, nonmagical metal in 1 round.
False Appearance. While the ooze remains motionless, it is indistinguishable from an oily pool or wet rock.

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Actions

Pseudopod. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 4 ( 1d6+1 ) bludgeoning damage plus 7 ( 2d6 ) acid damage, and if the target is wearing nonmagical metal armor, its armor is partly corroded and takes a permanent and cumulative -1 penalty to the AC it offers. The armor is destroyed if the penalty reduces its AC to 10.