Legendary Resistance (1/Day): 

If Zarvokharn fails a saving throw, he can choose to succeed instead.

Fearsome Presence: 

Any creature that starts its turn within 30 ft. of Zarvokharn must succeed on a DC 14 Wisdom saving throw or be frightened until the end of their next turn.

Multiattack. The dragon makes two Rend attacks and one Bite attack.

Rend. Melee Attack Roll: +11, reach 10 ft. Hit: 14 (2d6 + 7) Slashing damage plus 5 (1d10) Fire damage.

Bite. Melee Attack Roll: +11, reach 10 ft. Hit: 18 (2d10 + 7) Piercing damage plus 5 (1d10) Fire damage.

Fire Breath (Recharge 5–6). Dexterity Saving Throw: DC 17, each creature in a 30-foot Cone. Failure: 56 (16d6) Fire damage. Success: Half damage.

Zarvokharn can take 2 legendary actions, choosing from the options below. Only one option can be used at a time and only at the end of another creature's turn. He regains spent legendary actions at the start of his turn.

• Detect. Zarvokharn makes a Wisdom (Perception) check.

• Tail Attack. Zarvokharn makes a tail attack (+11 to hit, 15 ft. reach, 15 (2d8 + 7) bludgeoning damage).

• Wing Attack (Costs 2 Actions). Zarvokharn beats his wings. Each creature within 10 ft. must succeed on a DC 16 Dexterity saving throw or take 9 (2d8) bludgeoning damage and be knocked prone. Zarvokharn can then fly up to half his flying speed.