Multiattack

The dragon attacks once with its bite and twice with its claws.

Bite

Melee Weapon Attack: +11 to hit, reach 10 ft., one target. Hit: 21 (3d10 + 5) piercing damage.

Claws

Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 18 (3d8 + 5) slashing damage.

Torrential Breath (Recharge 5-6)

The dragon exhales water in a 60-foot-long 5-foot-wide line. Each creature in the area makes a DC 18 Dexterity saving throw taking 56 (16d6) bludgeoning damage on a failed save or half damage on a success. A creature that fails the save is also knocked prone and is pushed up to 30 feet away. A creature that impacts a solid object takes an extra 10 (3d6) bludgeoning damage.