Young Red Dragon Zombie

Undead Fortitude (1/Day). If the zombie is reduced to 0 hit points by damage that isnt radiant or from a critical hit, its instead reduced to 1 hit point, falls prone, and is stunned until the end of its next turn, appearing to be dead.

Undead Nature. A zombie doesnt require air, sustenance, or sleep.

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

Bite. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 22 (3d10 + 6) piercing damage plus 4 (1d8) fire damage.

Claws. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 15 (2d8 + 6) slashing damage.

Fire Breath (Recharge 5-6). The dragon exhales a blast of fire that fills a 30-foot cone. Each creature in that area makes a DC 17 Dexterity saving throw taking 52 (15d6) fire damage on a failed save or half damage on a success. A creature that fails the saving throw also suffers 5 (1d10) ongoing fire damage. While affected by this ongoing damage it is frightened of the dragon. A creature can use an action to end the ongoing damage.