Armor Class 16 (natural armor)
Hit Points 150 (20d8 +60)
Speed 15 ft., swim 40 ft.
Saving Throws —
Skills Perception +3
Damage Immunities —
Condition Immunities charmed, poisoned
Senses darkvision 120', passive Perception 17
Languages Aquan, Common, Sylvan
Challenge 9 (5,000 XP)
Amphibious. Can breathe air and water.
Magic Resistance. Advantage: spell/magic effect saves.
Polluted Aura. Each creature in same water as hag and that starts its turn within 20' of hag: poisoned while within aura and for 1 min after it leaves (DC 16 Con not poisoned). A poisoned creature that starts its turn outside aura can re-save success ends effect on itself.
Skilled Submariner. Advantage on Wis (Perception) and Wis (Survival) checks to find creatures and objects underwater. Has advantage on Dex (Stealth) checks made to hide while underwater.
Speak with Aquatic Creatures. Communicate with Beasts and Monstrosities that have a swimming speed as if they shared a language.
Multiattack. Two Claw attacks and one Tail Slap attack.
Claw. Melee Weapon Attack: +7 to hit, 5 ft., one target, 12 (2d8+3) slashing damage + 7 (2d6) poison. Target incapacitated until the end of its next turn (DC 16 Con not incapacitated). If it fails the save by 5+ it is paralyzed instead.
Tail Slap. Melee Weapon Attack: +7 to hit, 5 ft., one target, 16 (2d12 +3) bludgeoning damage and target must make DC 16 Str save or pushed up to 10 ft. away from the hag.
Shriek (Recharge 5-6). Unleashes a painful screeching in a 30' cone. Each creature in the area: 33 (6d10) thunder and is stunned until the end of its next turn (DC 16 Con half damage and isn't stunned).
Denizens of the Deep (1/Day). Magically calls 4 reef sharks 2 swarms of quippers or 1 Beast of up to CR 2 with swim speed. Arrive in 1d4 rounds act as hag allies obeying her spoken commands. Beasts stay 1 hr until hag dies or until hag dismisses them as bonus action.
Spellcasting. Cha (DC 16) no material components: At will: minor illusion • 3/day ea: charm person major image1/day: control water