Auntie Longteeth

Coven Magic. While within 30 feet of at least two hag allies, the hag can cast one of the following spells, requiring no Material components, using the spell’s normal casting time, and using Intelligence as the spellcasting ability (spell save DC 14): Augury, Find Familiar, Identify, Locate Object, Scrying, or Unseen Servant. The hag must finish a Long Rest before using this trait to cast that spell again.

Mimicry. The hag can mimic animal sounds and humanoid voices. A creature that hears the sounds can tell they are imitations with a successful DC 15 Wisdom (Insight) check.

 Amphibious. The hag can breathe air and water.

Magic Resistance. The hag has Advantage on saving throws against spells and other magical effects.

Soul Bag. The hag has a soul bag. While holding or carrying the bag, the hag can use its Nightmare Haunting action.

The bag has AC 15, HP 20, and Resistance to all damage. The bag turns to dust if reduced to 0 Hit Points. If the bag is destroyed, any souls the bag is holding are released. The hag can create a new bag after 7 days.

Multiattack. The hag makes two Claw attacks.

Claw. Melee Attack Roll: +7, reach 5 ft. Hit: 13 (2d8 + 4) Slashing damage.

Nightmare Haunting (1/Day; Requires Soul Bag). While on the Ethereal Plane, the hag casts Dream, using the same spellcasting ability as Spellcasting. Only the hag can serve as the spell’s messenger, and the target must be a creature the hag can see on the Material Plane. The spell fails and is wasted if the target is under the effect of the Protection from Evil and Good spell or within a Magic Circle spell.

If the target takes damage from the Dream spell, the target’s Hit Point maximum decreases by an amount equal to that damage. If the spell kills the target, its soul is trapped in the hag’s soul bag, and the target can’t be raised from the dead until its soul is released.

Luring Song. The hag sings a magical melody, which lasts until the harpy’s Concentration ends on it. Wisdom Saving Throw: DC 14, each Humanoid and Giant in a 300-foot Emanation originating from the harpy when the song starts. Failure: The target has the Charmed condition until the song ends and repeats the save at the end of each of its turns. While Charmed, the target has the Incapacitated condition and ignores the Luring Song of other hags or harpies. If the target is more than 5 feet from the harpy, the target moves on its turn toward the hag by the most direct route, trying to get within 5 feet of the hag. It doesn’t avoid Opportunity Attacks; however, before moving into damaging terrain (such as lava or a pit) and whenever it takes damage from a source other than the hag, the target repeats the save. Success: The target is immune to this hag’s Luring Song for 24 hours.

Spellcasting. The hag casts one of the following spells, requiring no Material components and using Intelligence as the spellcasting ability (spell save DC 14):

At Will: Detect Magic, Etherealness, Ray of Frost, Toll the Dead, Chill Touch, Frostbite, Ice Knife
2/Day Each: Phantasmal Killer, Plane Shift (self only), Cone of Cold, Greater Invisibility, Rime's Binding Ice

Shape-Shift. The hag shape-shifts into a Small or Medium Humanoid, or it returns to its true form. Other than its size, its game statistics are the same in each form. Any equipment it is wearing or carrying isn’t transformed.