Actions

Multiattack .
The dragon can use its Frightful Presence.
It then makes three attacks: one with its bite and two with its claws.
Bite .
Melee Weopon Attack: +17 to hit, reach 15 ft., one target.
Hit : 21
(2d10 + 10) piercing damage plus 14
(4d6) fire damage.
Claw .
Melee Weapon Attack : +17 to hit, reach 10 ft., one target.
Hit : 17
(2d6 + 10) slashing damage.
Tail .
Melee Weapon Attack : +17 to hit, reach 20 ft., one target.
Hit : 19
(2d8 + 10) bludgeoning damage.
Frightful Presence .
Each creature of the dragon's choice that is within 120 feet of the dragon and aware of it must succeed on a DC 21 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 dragon's Frightful Presence for the next 24 hours.
Fire Breath
(Recharge 5-6) .
The dragon exhales fire in a 90-foot cone.
Each creature in that area must make a DC 24 Dexterity saving throw, taking 91
(26d6) fire damage on a failed save, or half as much damage on a successful one.