Octo-Ooze

Large ooze, unaligned

Armor Class 11

11 Hit Points 136 (16d10 + 48)

136 (16d10 + 48) Speed 20 ft., climb 20 ft., swim 40 ft.

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

Damage Immunities acid, slashing

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

blinded, charmed, deafened, exhaustion, frightened, prone Senses blindsight 60 ft. (blind beyond this radius), passive Perception 8

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

— Challenge 5 (1,800 XP)

Actions

Multiattack. The octo-ooze makes up to four tentacle attacks, each of which it can replace with one use of Fling or Engulf.

Tentacle. Melee Weapon Attack: +6 to hit, reach 10 ft., one target. Hit 5 (1d4 + 3) bludgeoning damage plus 7 (2d6) acid damage, and the target is grapppled (escape DC 15)

Fling. One Large or smaller object held or creature grappled by the octo-ooze is thrown up to 30 feet in a random direction and knocked prone. If a thrown target meets a solid surface, the target takes 2 (1d4) bludgeoning damage for every 10 feet thrown. If the target is thrown at another creature, that creature must succeed on a DC 15 Dexterity saving throw or take the same damage as the target and be knocked prone.

Engulf. The octo-ooze moves one grappled creature into its central body. The grappled creature must make a DC 15 Dexterity saving throw.

On a successful save, the creature escapes the grapple and can choose to be pushed 5 feet in any direction from the octo-ooze. A creature that chooses not to be pushed suffers the consequences of a failed saving throw.

On a failed save, the creature enters the octo-ooze's space; and the creature takes 10 (3d6) acid damage and is engulfed. The engulfed creature can't breath, is restrained, and takes 21 (6d6) acid damage at the start of each of the octo-ooze's turns. When the octo-ooze moves, the engulfed creature moves with it.

An engulfed creature can try to escape by taking an action to make a DC 15 Streangth check. On a success, the creature escapes and enters a space of its choice within 5 feet of the octo-ooze.

Reactions

Split. When an octo-ooze is subjected to slashing damage, one of its eight arms are chopped off and the limb becomes a slithering tentacle. This can happen four times, after which the octo-ooze will lose an attack with multiattack for every time this reaction is used.