Actions

Multiattack. The aspect can use its Frightful Presence. It then makes three attacks: one with its bite, one with its claws, and one tail attack   Bite. Melee Weapon Attack: +19 to hit, reach 20 ft., one target. Hit: (2d12 + 10) piercing damage plus (3d12) force damage. If the attack hits a creature, the target must make a DC 27 (8 + Prof + Cha) Wisdom saving throw or become frightened of the aspect until the end of its next turn.   Claw. Melee Weapon Attack: +19 to hit, reach 15 ft., one target. Hit: (2d10 + 10) slashing damage. If the target is a Huge or smaller creature, it is grappled (escape DC 29 (10+Athletics)) and is restrained until this grapple ends. The aspect can only have one creature grappled this way at a time.   Tail. Melee Weapon Attack: +19 to hit, reach 25 ft., one target. Hit: (2d12 + 10) bludgeoning damage. If the target is a creature, it must make a DC 27 (8 +Prof + Str) Strength saving throw or be knocked prone   Breath Weapon (Recharge 5-6). The aspect uses one of the following breathe weapons.   Chromatic Flames. The aspect exhales multicoloured flames in a 300-foot cone. Each creature in that area must make a DC 27 (8 + Prof + Str) Dexterity saving throw, taking 104 (16d12) damage of a type of the aspect's choosing; acid, cold, fire, lighting, or poison (This choice is made for each creature effected individually), on a failed save, or half as much damage on a successful one.   Bolstering Flames. The aspect exhales black flames in a 300-foot cone. each creature of the aspects choice gains 52 (8d12) temporary hits points, and each creature of the aspect's choice gains advantage on it's attack roll, saving throw or ability check before the end of it's next turn.  

Bonus Action

Change Shape. The dragon magically polymorphs into a Humanoid or beast that has a Challenge rating no higher than its own, or back into its true form. It reverts to its true form if it dies. Any Equipment it is wearing or carrying is absorbed or borne by the new form (the dragon's choice). In a new form, the Dragon retains its Alignment, Hit Points, Hit Dice, ability to speak, Proficiencies, Legendary Resistance, lair Actions, and Intelligence, Wisdom, and Charisma scores, as well as this action. Its Statistics and capabilities are otherwise replaced by those of the new form, except any Class Features or legendary Actions of that form.

Legendary Actions

The aspect 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. The aspect regains spent legendary actions at the start of their turn.   Detect. The dragon makes a Wisdom (Perception) check.   Attack. The dragon makes a claw or tail attack.   Wing Attack (Costs 2 Actions). The dragon beats its wings. Each creature within 30 ft. of the dragon must succeed on a DC 27 (8 + Prof + Str) Dexterity saving throw or take 17 (2d6 + 10) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.  

Mythic Actions

If the aspect's Draconic Awakening trait has activated in the last hour, it can use the options below as legendary actions.   Bite. The aspect makes a bite attack.   Hurl Through Avernus (Costs 2 Actions). The aspect targets a creature she is grappling. The creature must succeed on a DC 26 (8 + Prof + Wis) Charisma saving throw. or take 44 (8d10) psychic damage and be banished to Avernus. At the start of the aspect's next turn, the creature reapers in an unoccupied space within 10ft of the aspect.   Chromatic Flare (Costs 3 Actions). The aspect flares with energy. Each creature of the aspect's choice in a 60-foot-radius sphere centered on her must make a DC 26 (8 + Prof + Wis) Dexterity saving throw. on a failed save, the creature takes 39 (6d12) damage chosen by the aspect: acid, cold, fire, lightning, or poison (This choice is made for each creature effected individually). On a successful save, the creature takes half as much damage.