Multiattack

The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.

Bite

Melee Weapon Attack: +11 to hit, reach 10 ft., one target. Hit: 17 (2d10 + 6) piercing damage.

Claw

Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 13 (2d6 + 6) slashing damage.

Tail

Melee Weapon Attack: +11 to hit, reach 15 ft., one target. Hit: 15 (2d8 + 6) bludgeoning damage.

Frightful Presence

Each creature of the dragon's choice that is within 120 feet of the dragon and aware of it must succeed on a DC 19 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 the dragon's Frightful Presence for the next 24 hours.

Breath Weapon (Recharge 5-6)

The dragon uses one of the following breath weapons: Radiant Breath. The dragon exhales radiant energy in a 60-foot cone. Each creature in that area must make a DC 19 Dexterity saving throw, taking 55 (10d10) radiant damage on a failed save, or half as much damage on a successful one. Flaring Breath. The dragon emits a flash of dazzling light from its maw in a 60-foot cone. Each creature in that area must make a DC 19 Constitution saving throw or be blinded. Undead within the area of effect must also make a DC 19 Wisdom saving throw or be turned for 1 minute. Undead of CR 2 or lower who fail the saving throw are instantly destroyed.