Multiattack

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

Bite

Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 20 (3d10 + 4) piercing damage plus 4 (1d8) poison damage.

Claw

Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) slashing damage.

Poison Breath (Recharge 5-6)

The dragon exhales poisonous gas in a 30-foot cone. Each creature in that area makes a DC 15 Constitution saving throw taking 42 (12d6) poison damage on a failed save or half damage on a success.