Celebrant

 Authority of the Dragon Crown. Celebrant can invoke the dragon crown and his status as king to comman dragons. Ounce per turn he can use the dragon crown to send a command to dragons. Each dragon with in 3 miles of celebrant makes a DC 30 Intelligence saving throw. on a failed saving through they must obey that command. Any dragon within 300 ft. must obey him. 

 Legendary Resistance (3/Day). If the dragon fails a saving throw, it can choose to succeed instead.

Multiattack. Celebrant can use its Frightful Presence. He then makes three attacks: one with its bite and two with its claws.

Bite. Melee Weapon Attack: +19 to hit, reach 15 ft., 1 target. Hit: 48 (6d12 + 12) piercing damage. 

Claw. Melee Weapon Attack: +19 to hit, reach 15 ft., 1 target. Hit: 39 (6d8 + 12) slashing damage. 

Tail. Melee Weapon Attack: +19 to hit, reach 15 ft., 2 target. Hit: 45 (6d10 + 12) piercing damage. 

Frightful Presence. Each creature of Celebrant's choice that is within 120 feet of Celebrant and aware of him must succeed on a DC 21 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to Celebrant's Frightful Presence for the next 24 hours.

Fire Breath (Recharge 5–6). Celebrant exhales fire in a 90-foot cone. Each creature in that area must make a DC 24 Dexterity saving throw, taking 105 (30d6) fire damage on a failed save, or half as much damage on a successful one.

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Celebrant 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. Celebrant regains spent legendary action at the start of his turn.

Detect. Celebrant makes a wisdom (perception) check.

Tail attack. Celebrant makes a tail attack.

Wing Attack (Costs 2 Actions). Celebrant beats his wings. Each creature within 15 feet of Celebrant must succeed on a DC 25 Dexterity saving throw or take 40 (6d8 + 13) bludgeoning damage and be knocked prone. Celebrant can then fly up to half his flying speed.