Black Pudding

Large ooze, unaligned

Armor Class 7 (dex)

Hit Points 85 (10d10+30)

Speed walk 20 ft., climb 20 ft.

Challenge CR 4 (1100 XP) · Proficiency bonus +2

STR16+3

DEX5−3

CON16+3

INT1−5

WIS6−2

CHA1−5

Immunities: acid, cold, lightning, slashing

Condition immunities: Blinded, Charmed, Exhaustion, Frightened, Prone

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

Traits

Amorphous. The pudding can move through a space as narrow as 1 inch wide without squeezing.

Corrosive Form. A creature that touches the pudding or hits it with a melee attack while within 5 feet of it takes 4 (1d8) acid damage. Any nonmagical weapon made of metal or wood that hits the pudding 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 or wood that hits the pudding is destroyed after dealing damage. The pudding can eat through 2-inch-thick, nonmagical wood or metal in 1 round.

Spider Climb. The pudding can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.

Actions

Pseudopod. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 3) bludgeoning damage plus 18 (4d8) acid damage. In addition, nonmagical armor worn by the target is partly dissolved 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.