Argutharux

Innate Spellcasting. Argutharux’s innate spellcasting ability is Charisma (spell save DC 17). He can innately cast the following spells, requiring no material components:

At will: mage hand

1/day each: dominate person, hypnotic pattern, suggestion

Draconic Awareness. Argutharux knows if he hears a lie.

Legendary Resistance (3/Day). If Argutharux fails a saving throw, he can choose to succeed instead.

Multiattack. Argutharux can use his Frightful Presence. He then makes three attacks: one with his bite and two with his claws.

Bite. Melee Weapon Attack: +12 to hit, reach 10 ft., one target. Hit: 18 (2d10 + 7) piercing damage plus 7 (2d6) fire damage.

Claw. Melee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit: 14 (2d6 + 7) slashing damage.

Tail. Melee Weapon Attack: +12 to hit, reach 15 ft., one target. Hit: 16 (2d8 + 7) bludgeoning damage. If the target is a creature, it must succeed on a DC 20 Strength saving throw or be knocked prone.

Frightful Presence. Each creature of Argutharux's choice that is within 120 feet of Argutharux and aware of him must succeed on a DC 17 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 Argutharux's Frightful Presence for the next 24 hours.

Ardent Flyby. When Argutharux moves in a straight line during this turn, every creature under him within 60 feet suffers the effect of the Fire Breath. Argutharux can't break this line.

Fire Breath. Argutharux exhales fire in a 60-foot cone. Each creature in that area must make a DC 18 Dexterity saving throw. On a failed save it takes 52 (15d6) fire damage and ignites. Until a creature takes an action to douse the fire, the target takes 5 (1d10) fire damage at the start of each of its turns. On a successful save the creature takes half as much damage with no additional effects.

Argutharux can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. Argutharux regains spent legendary actions at the start of his turn.

Detect. Argutharux makes a Wisdom (Perception) check.

Tail Attack. Argutharux makes a tail attack.

Cast a Spell (Costs 2 Actions). Argutharux uses Innate Spellcasting.

Wing Attack (Costs 2 Actions). Argutharux beats his wings. Each creature within 10 feet of him must succeed on a DC 20 Dexterity saving throw or take 14 (2d6 + 7) bludgeoning damage, be pushed 10 feet away and knocked prone. Argutharux can then fly up to half his flying speed.