Multiattack

The dragon uses its Frightful Presence. It then makes one Bite attack and two Claw attacks. It can replace its Bite attack with a use of Sleep Breath, if available.

Bite

_Melee Weapon Attack:_ +14 to hit, reach 15 ft., one target. _Hit:_ 19 (2d10+8) piercing damage.

Claw

_Melee Weapon Attack:_ +14 to hit, reach 10 ft., one target. _Hit:_ 15 (2d6+8) slashing damage.

Tail

_Melee Weapon Attack:_ +14 to hit, reach 20 ft., one target. _Hit:_ 17 (2d8+8) 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 18 WIS save or be frightened for 1 minute. A creature can repeat the save at the end of each of its turns, ending the effect on itself on a success. If a creature's save 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 120-foot line that is 10 feet wide. Each creature in that line must make a DC 21 DEX save, taking 70 (20d6) fire damage on a failed save, or half as much damage on a successful one.

Sleep Breath (Recharge 6)

The dragon exhales sleep gas in a 90-foot cone. Each creature in that area must succeed on a DC 21 CON save or fall unconscious for 10 minutes. This effect ends for a creature if the creature takes damage or another creature uses an action to wake it.