Aspect of Sardior

Ruby Resilience (Recharges after a Short or Long Rest). If the aspect would be reduced to 0 hit points his current hit point total instead resets to 500 hit points, he recharges his breath weapon, and he regains any expended uses of Legendary Resistance. Additionally, the Aspect of Sardior can now use the options in the "Mythic Actions" section for 1 hour. Award a party an additional 155,000 XP for defeating the aspect of Sardior after his Ruby Resiliance activates.

Legendary Resistance (5/Day). If the aspect fails a saving throw he can choose to succeed instead.

Multiattack. The aspect of Sardior makes one Bite attack, one Claw attack, and one Tail attack.

Bite. Melee Weapon Attack: +17 to hit, reach 20 ft., one target. Hit: 21 (2d12 + 8) piercing damage and 26 (4d12) force damage.

Claw. Melee Weapon Attack: +17 to hit, reach 15 ft., one target. Hit: 19 (2d10 + 8) slashing damage. If the target is Huge sized or smaller it is grappled (escape DC 18) and is restrained until this grapple ends. The aspect can only have one creature grappled like this at a time.

Tail. Melee Weapon Attack: +17 to hit, reach 15 ft., one target. Hit: 21 (2d12 + 8) bludgeoning damage. If the target is a creature it must succeed on a DC 25 Strength saving throw or be knocked prone.

Pyre of Joy (Recharge 5-6). The aspect exhales shimmering prismatic flames in a 300 ft. cone. Each creature in that area must make a DC 26 Constitution saving throw or take 13 (2d12) radiant damage, 13 (2d12) thunder damage, 13 (2d12) psychic dmage, 13 (2d12) necrotic damage, and 13 (2d12) force damage on a fail or half as much on a successful saving throw. Additionally, when a creature fails this saving throw they suffer two levels of exhuastion. On a successful save the creature only takes one level of exhuastion. A creature can only gain five levels of exhuastion in this way. 

Dominant Psyche. The aspect can telikinetically grapple any number of creatures or objects within 120 ft. of it that fail a DC 26 Strength saving throw. A creature grappled in this way is restrained and can repeat the saving throw at the end of each of it's turns or any time it takes damage. The aspect can move anything it is telikinetically grasping up to 60 ft. with a Bonus Action on subsequent turns but cannot move them farther than 180 ft. away from himself. If a creature is slammed into a wall or similar solid object while grappled they take 52 (8d12) bludgeoning damage.

Psionic Shield. As a reaction the aspect of Sardior uses his immense psionic powers to absorb the damage dealt by a single source of damage. When this reaction is taken Sardior heals a number of hit points equal to the damage he would have otherwise taken. 

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 his turn.

Attack. The aspect makes one Claw or Tail attack.

Furious Bite (Costs 2 Actions). The aspect makes one Bite attacke. If the attack hits a creature, the target must succeed on a DC 26 Wisdom saving throw or become Frightened of the aspect until the end of thetarget's next turn.

If the aspect's Ruby Resilience trait has activated in the last hour, he can use the options below as legendary actions.

Blood Red Moon (Costs 2 Actions). The aspect summons an illusory blood red moon with a 20 ft. radius centered on a point within 90 ft. Any creature of the aspects choice within 60 ft. of the moon must succeed on a DC 24 Charisma saving throw taking 22 (4d10) radiant damage and become paralyzed until the end of that creatures next turn. On a success the creature takes half the damage and isn't paralyzed.

Secrets of the Ruby Dragon (Costs 3 Actions). The aspect summons an incredible psionic force which allows the aspect of Sardior to walk up to his movement speed throught he astral plane. He disappears from this plane and reappears where he chooses to. Until the start of his next turn the aspect has resistance to all damage excpet for Force damage which he gains vulnerability to for the same duration.