|This material from the 5th edition SRD is published under the OGL|
|Medium ooze, unaligned|
|Armor Class: 8|
|Hit Points: 22 (3d8+9)|
|Speed: 10 ft., climb 10 ft.|
|Damage Resistances: acid, cold, fire|
|Condition Immunity: blinded, charmed, deafened, exhaustion, prone|
|Senses: blindsight 60 ft. (blind beyond this radius), passive Perception 8|
|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.
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.