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

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

Bite. Melee Weapon Attack: +11 to hit, reach 10 ft., one target. Hit: 17 (2d10 + 6) piercing damage.

Claw. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 13 (2d6 + 6) slashing damage.

Earthquake (Recharge 5–6). The dragon creates an earthquake in a 60-foot diameter cirlcle around it. Each creature in that area must succeed on a DC 18 CON saving throw. On a failed save, the creature falls prone and takes 54 (12d8) force damage. In addition, the creature is stunned until the end of its next turn.

Vine Snare (Recharge 5–6).  The dragon exhales and large vines shoot out of its mouth in a 30-foot cone. Any creature in the area must succeed on a DC 17 DEX saving throw. On a failed save the creature is restrained. At the end of each of its turns it can try and make a DC 15 acrobatics or athletics check to get out of them. (AC 15 to damage the vines, 20 hit points each).