Legendary Resistance (3/Day). If the dragon fails a saving throw, it can choose to succeed instead.

Multiattack. The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.

Bite. Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 8 (1d10 + 5) piercing damage.

Claw. Melee Weapon Attack: +13 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 6) slashing damage.

Tail. Melee Weapon Attack: +13 to hit, reach 15 ft., one target. Hit: 10 (1d10 + 6) bludgeoning damage.

Breath Weapons (Recharge 5–6). The dragon uses one of the following breath weapons.

Death mist Breath. The dragon exhales a dark deathly mist in a 40-foot circle. Each creature in that area must make a DC 17 Constitution saving throw, taking 36 (11d6) Necrotic damage on a failed save, or half as much damage on a successful one.

Bone shard shrapnel. The dragon shoots medium-sized sharp fragments of bone shards in a 25-foot cylinder. Each creature in that area must make a DC 17 Constitution saving throw, taking 23 (13d4) Slashing damage on a failed save, or half as much damage on a successful one.