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.

Claw

Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 13 (2d6 + 6) slashing damage.

Lightning Breath (Recharge 5-6)

The dragon exhales lightning in a 60-foot line that is 5 feet wide. Each creature in that line must make a DC 17 Dexterity saving throw, taking 44 (8d10) lightning damage on a failed save, or half as much damage on a successful one.