Adult Red Dragon

3/day. If the adult red dragon fails a saving throw, it can choose to succeed instead.

3 legendary actions; one at a time at the end of another creature’s turn, regaining spent uses at the start of its turn

The adult red dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.

Melee Weapon Attack: +14 to hit, reach 10 ft.. Hit: 19 (2d10 + 8) piercing plus 7 (2d6) fire damage.

Melee Weapon Attack: +14 to hit, reach 5 ft.. Hit: 15 (2d6 + 8) slashing damage.

Each creature of the adult red dragon's choice that is within 120 ft. of the dragon and aware of it must succeed on a DC 19 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 adult red dragon's Frightful Presence for the next 24 hours.

Recharge 5–6. The adult red dragon exhales fire in a 60-foot cone. Each creature in that area must make a DC 21 Dexterity saving throw, taking 63 (18d6) fire damage on a failed save, or half as much damage on a successful one.

Melee Weapon Attack: +14 to hit, reach 15 ft.. Hit: 17 (2d8 + 8) bludgeoning damage.

The adult red dragon makes a Wisdom (Perception) check.

The adult red dragon makes a tail attack.

Costs 2 legendary actions. The adult red dragon beats its wings. Each creature within 10 ft. of the adult red dragon must succeed on a DC 22 Dexterity saving throw or take 15 (2d6 + 8) bludgeoning damage and be knocked prone. The adult red dragon can then fly up to half its flying speed.