Lesser Legendary Resistance (1/Day). If the dragon fails a saving throw, it can choose to reroll it with advantage.

Multiattack. The dragon makes one bite attack and two claw attacks.

Bite. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 10 (1d12 + 4) piercing damage plus 1 fire damage.

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

Tail. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 9 (1d10 + 4) bludgeoning damage.

Fire Breath (Recharge 5–6). The dragon exhales fire in a 35-foot cone. Each creature in that area must make a DC 14 Dexterity saving throw, taking 35 (10d6) fire damage on a failed save, or half as much damage on a successful one.

Explosive Shield (Recharge 5-6). The dragon creates a magical shield around itself that lasts until the end of the next round. While the shield is active, damage the dragon takes from attacks and the results of failed saving throws is reduced by 10 (3d6). Once the shield has reduced a total of 28 (8d6) hit points worth of damage, it explodes in a 35-foot radius. When the shield explodes, each creature hostile to the dragon and its allies within the area must make a DC 15 Dexterity saving throw, taking 7 (2d6) force damage and being knocked prone on a failed save, or half as much damage and no other effects on a success.

Rejuvenating Heal (Recharge 4-6). The dragon channels magical energy and heat through its body, causing it to regain 3d8 hit points at the start of each of its turns for 1 minute.