Undying: Upon dropping below 0 hit points, the Zombie Dragon makes a Constitution saving throw with a DC of 10 + 5 for each successful save, unless the damage is radiant or from a critical hit. 

Multiattack: The Zombie Dragon makes 3 attacks, one with its bite and 2 claw attacks. 

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

Claw: Melee Weapon Attack: +7 to hit, reach 5 ft., 1 target. Hit:  (2d6 + 4) slashing damage. 

Noxious Breath: (Recharges with a 5-6) The Zombie Dragon releases a 30 ft. cone of putrid fumes, each creature must make a Constitution saving throw (DC = 12) on a failed save, each creature affected takes 6d6 poison damage (half as much on a successful save) and is overcome with the need to vomit, and is considered paralyzed, an affected creature can try making the saving throw again at the beginning of each of their turns.