Multiattack. The dragon makes three attacks: one with its bite and two with its claws.
Bite. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 17 2d10+6 piercing damage plus 3 1d6 fire damage.
Claw. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 13 2d6+6 slashing damage.
Fire Breath (Recharge 5-6). The dragon exhales fire in a 30-foot cone. Each creature in that area must make a DC 17 Dexterity saving throw, taking 56 16d6 fire damage on a failed save, or half as much damage on a successful one.