Magic Resistance. The bone dragon has advantage on saving throws against spells and other magical effects.

Multiattack. The dragon makes three attacks: one with its bite and two with its claws.

Bite. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 15 (2d10 + 4) piercing damage plus 4 (1d8) necrotic damage.

Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) slashing damage.

Frightful Presence. Each creature of the bone dragon’s choice that is within 120 feet of the bone dragon and aware of it must succeed on a DC 15 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature’s saving throw is successful or the effect ends for it, the creature is immune to the bone dragon’s Frightful Presence for the next 24 hours.

Dust Breath (Recharge 5–6). The dragon exhales an necrotic blast in a 30-foot cone. Each creature in that area must make a DC 15 Constitution saving throw, taking 45 (10d8) necrotic damage on a failed save, or half as much damage on a successful one.