Gray Ooze

Medium ooze, unaligned

Armor Class: 8
Hit Points: 22 (3d8 + 9)
Speed: 10 ft., climb 10 ft.

STR: 12 (+1)
DEX: 6 (−2)
CON: 16 (+3)
INT: 1 (−5)
WIS: 6 (−2)
CHA: 2 (−4)

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 (100 XP)

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.

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.

Running this fight? Add the gray ooze to the initiative tracker: type its name and the AC, hit points and initiative bonus fill in, and the book button shows this stat block mid-fight.