Auril can't be Surprised and can't be changed into another form against her will.
Divine Rejuvenation
When Auril drops to 0 hit points, her body turns to slush and melts away. Auril instantly reappears in her , in an unoccupied space within 60 feet of where her first form disappeared. Her initiative count doesn't change.
Legendary Resistance (2/Day in This Form)
If Auril fails a saving throw, she can choose to succeed instead.
Magic Resistance
Auril has advantage on saving throws against spells and other magical effects.
Unusual Nature
Auril doesn't require air, food, drink, or sleep.
Actions
Multiattack
Auril attacks twice with her talons.
Talons
Melee Weapon Attack+7 to hit, reach 5 ft., one target. 7 () 🏹 Piercing damage plus 3 () ❄️ Cold damage.
Touch of Frost
Melee Spell Attack+13 to hit, reach 5 ft., one creature. 13 () ❄️ Cold damage, and the target can't take reactions until the start of its next turn.
Chromatic Orb
Ranged Spell Attack+13 to hit, range 90 ft., one creature. 13 () ❄️ Cold damage.
Legendary Actions
Talons
Auril attacks once with her talons.
Teleport
Auril teleports to an unoccupied space she can see within 30 feet of her.