Chloracridara, Ascended Queen of Roses

Gifted Form (Recharges after a Short or Long Rest). If Chloracridara would be reduced to 0 hit points, she instead reverts to her ancient green dragon form, her current hit point total resets to 350 hit points, she recharges her Breath Weapon, and she regains 2 expended uses of Legendary Resistance. 

Legendary Resistance (4/Day). If Chloracridara fails a saving throw, she can choose to succeed instead.

Unusual Nature. Chloracridara doesn’t require food or drink.

Multiattack. Chloracridara makes one Bite attack and two Claw attacks.

Bite. Melee Weapon Attack: +18 to hit, reach 15 ft., one target. Hit: 21 (2d10 + 10) piercing damage plus 13 (2d12) poison damage.

Claw. Melee Weapon Attack: +18 to hit, reach 10 ft., one target. Hit: 19 (2d8 + 10) slashing damage plus 9 (2d8) poison damage. If the target is a Huge or smaller creature, it is grappled (escape DC 21) and is restrained until this grapple ends. Chloracridara can have only one creature grappled this way at a time.

Tail. Melee Weapon Attack: +18 to hit, reach 20 ft., one target. Hit: 19 (2d8 + 10) bludgeoning damage. If the target is a creature, it must succeed on a DC 26 Strength saving throw or be knocked prone.

Breath Weapon (Recharge 5–6). Chloracridara exhales a blast of energy in a 300-foot cone. Each creature in that area must make a DC 26 Dexterity saving throw. On a failed save, the creature takes 78 (12d12) poison damage and is now poisoned for one minute. On a successful save, the creature takes half as much damage.

Quick Attack. Chloracridara can make one claw or tail attack against a nearby creature.

Chloracridara can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. Chloracridara regains spent legendary actions at the start of her turn.

Attack. Chloracridara makes one Claw or Tail attack.

Toss Aside (Costs 2 Actions). Chloracridara throws a creature she has grappled up to 200 feet in any direction away from her. A creature being thrown this way can use their reaction to brace themselves by making a DC 26 Strength or Dexterity saving throw, reducing the damage they would take by the total of their roll on a success. A creature that takes fall damage because of this attack assumes all 200 feet of damage, even if they hit the surface before then.

Wing Attack (Costs 2 Actions). Chloracridara beats her wings. Each creature within 30 feet of it must succeed on a DC 26 Dexterity saving throw or take 17 (2d6 + 10) bludgeoning damage and be knocked prone. Chloracridara can then fly up to half her flying speed.

Arcane Daggers (Costs 3 Actions). Chloracridara creates four daggers of magical force. Each dagger hits a creature of Chloracridara’s choice she can see within 120 feet of her, dealing 12 (1d6 + 8) force damage to its target, then disappears. Creatures struck this way must then pass a DC 21 Constitution Saving Throw or become poisoned for one minute.