Multiattack. The dragon makes three attacks: one with its bite and two with its claws.

Bite. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 14 (2d10 + 3) piercing damage plus 4 (1d8 + 4) radiant damage.

Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) slashing damage.

Star Fall (Recharge 6). The dragon roars to the heavens, and causes celestial light to fall from the stars. The dragon chooses four creatures within  300-foot radius centered on itself, and causes beams of light summoned from the stars to strike each creature. Each creature that light falls on must make a DC 15 Dexterity saving throw, taking 36 (8d8) radiant damage on a failed save, or half as much damage on a successful one. The dragon and its targets of choice must be exposed to starlight in order to use this attack.

Star Breath (Recharge 5-6). The dragon fires an 80-foot line of light that is 5 feet wide. Each creature caught in the line must make a DC 14 Dexterity saving throw, taking 45 (10d8) radiant damage on a failed save, or half as much damage on a successful one.