Sand Hag

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

Mimicry. The sand hag can mimic animal sounds and Humanoid voices. A creature that hears the sounds can tell they are imitations with a successful DC 16 Wisdom (Insight) check.

Scorpion Walk. Difficult terrain composed of sand or gravel doesn't cost the hag extra movement. In addition, while in sandy terrain, she doesn't leave tracks and has tremorsense out to a range of 30 feet.

Multiattack. The hag makes three Claw attacks. If two Claw attacks hit one creature, the target must succeed on a DC 14 Constitution saving throw or suffer one level of exhaustion. A creature can't suffer more than two levels of exhaustion from this effect.

Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) slashing damage.

Illusory Appearance. The sand hag covers herself and anything she is wearing or carrying with a magical illusion that makes her look like another creature of her general size and Humanoid shape. The illusion ends if the hag takes a bonus action to end it or if she dies.

Scouring Sirocco (Recharge 5-6). The sand hag generates a blast of hot wind and sand in a 30-foot cone. Each creature in the area must make a DC 14 Constitution saving throw. On a failure, a creature takes 14 (4d6) slashing damage and 9 (2d8) fire damage and is blinded for 1 minute. On a success, a creature takes half the damage and isn't blinded. A blinded creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. The area is heavily obscured by airborne sand until the start of the sand hag's next turn.

Spellcasting. The sand hag casts one of the following spells, requiring no material components and using Charisma as the spellcasting ability (spell save DC 14): At will: silent image 3/day each: hallucinatory terrain (as an action), major image