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

Bite. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 12 (2d6+2) piercing damage and 4 (1d4+2) fire damage.

Talons. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 12 (2d6+2) slashing damage.

Tail. Melee Weapon Attack: +7 to hit, reach 15 ft., one target. Hit: 13 (3d4+2) bludgeoning damage and the target must succeed on a DC 15 Strength saving throw or be knocked prone.

Laserfire Breath (Recharge 6). The dragon exhales violet-yellow-orange flames in a 30-foot cone. All creatures in that radius must make a DC 15 Dexterity saving throw, taking 21 (4d6) fire damage plus 21 (4d6) force damage and have its speed reduced by 20 ft until the start of the dragon's next turn on a failed save, or half as much damage and not have its speed reduced on a success.