Sludge Hag

Medium Fey, neutral oozy

AC: 17

Initiative: +1 (11)

HP: 82 (11d8 + 33)

Speed: 30 ft.

STR: 18 (+4)
DEX: 12 (+1)
CON: 16 (+3)
INT: 13 (+1)
WIS: 14 (+2)
CHA: 14 (+2)

Skills: Arcana +3, Deception +4, Perception +4, Stealth +3

Senses: darkvision 60 ft., Passive Perception 14

Languages: Common, Draconic, Sylvan

CR: 3 (XP 700; PB +2)

Amorphous.

The sludge hag can move through a space as narrow as 1 inch wide without squeezing.

Amphibious.

The sludge hag can breathe air and water.

Innate Spellcasting.

At will: acid splash, dancing lights, minor illusion

The hag's innate spellcasting ability is Charisma (spell save DC 12). She can innately cast the following spells, requiring no material components.

Actions

False Appearance.

The sludge hag collapses into a oily pool of sludge. While motionless, the sludge hag is indistinguishable from any other oily pool of oozy drippiness.

Sludge Slap.

Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 12 (1d8 + 8) bludgeoning damage, plus 4 (1d8) acid damage. Sludge Slap does both bludgeoning and acid damage.

Find this creature in the encounter builder

Source: Muk's Guide to Everything He Learned From Tasha, p. 33 - Licenses and attribution