Armor Class 17 (natural armor)
Hit Points 82 (11d8 + 33)
Speed 30 ft.
Skills Arcana +3, Deception +4, Perception +4, Stealth +3
Senses darkvision 60 ft., passive Perception 14
Languages Common, Draconic, Sylvan
Challenge 3
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.
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.
MGELFT, p. 33