Bringer

Legendary Resistance (5/day). If Bringer fails a saving throw, he can instead choose to succeed it.

Magic Resistance. Bringer has advantage on saving throws against spells and other magical effects. 

Whispers of the Void. Creatures within 60ft of Bringer with no connections to his patron have disadvantage on saving throws made from spells and other magical effects derived from him. 

Lohk (Recharges after Short or Long Rest). If Bringer  would be reduced to 0 hit points, his current hit point total instead resets to 400 hit points, he recharges his Embrace the Void and  he regains any expended uses of Legendary Resistance and spellcasting. Additionally, Bringer can now use the options in the “Mythic Actions” section for 1 hour. 

Limited Magic Immunity. If Bringer's Lohk feature is activated, spells of 6th level or lower can affect him unless he wishes to be.

Corruption. Bringer gains access to this trait if his Lohk feature is activated. Corruption from his patron begins to seep into the plane. Over the course of six rounds anyone with a connection to his patron will receive certain buffs and those without will receive debuffs. The following effects are active once certain qualifications are met:

Flourish & Atrophy (2 Rounds). Creatures with a connection to his patron regain 50 hit points at the start of each of their turns if they have at least 1 hit point left. Creatures without a connection take 50 necrotic damage at the start of their turn. 

Bolster & Weaken (4 rounds). Creatures with a connection to his patron gain a +10 to their attack rolls, damage rolls, spell save DC, and AC. Creatures without a connection gain a -5 to their attack rolls, damage rolls, spell save DC, and AC.

Overcome & Surrender (6 rounds). Creatures with a connection to his patron ignore resistance and immunity to damage or conditions from all their attacks and spells. Creatures without a connection deal one quarter of their original damage to those with a connection.

Hasten & Slow (8 rounds). Creatures with a connection to his patron gain the effects of the haste spell. Creatures without a connection gain the effects of the slow spell. 

Elevate & Reject (10 rounds). Creatures with a connection to his patron have their max hit points doubled and have their hit points restored to max. Creatures without a connection to his patron gain the paralyzed condition until Bringer dies.

Multiattack. Bringer can attack three times. They can be any combination of Eldritch Blasts, Indifferent Touch, or his Embrace the Void if available. 

Eldritch Blasts. Ranged Spell Attack: +19 to hit, range 120ft., one to four creatures. Hit: 21 (2d10+10) force damage per blast; four blasts total.

Indifferent Touch. Melee Spell Attack: +19 to hit, reach 5ft., one creature. Hit: 36 (4d12+10) force damage. Creatures hit with this must succeed a DC 25 wisdom saving throw or be charmed by Bringer. While charmed in this way the target creature simply drops whatever is in its' hands and does nothing. They reroll the saving throw to break free at the end of their turn. 

Embrace of the Void (Recharge 5-6). Creatures within a 120ft sphere of Bringer hear the call of the void. At the start of their turn they must make a DC 25 charisma saving throw or succumb to the noise taking 156 (24d12) psychic damage and gain the stunned until the start of their next turn. On a successful saving throw, they only take half damage with no other conditions. 

Bringer can take 5 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. Bringer regains spent legendary actions at the start of his turn.

Attack. Bringer makes an attack with his Eldritch Blasts or his Indifferent Touch.

Recovery & Retreat (Costs 2 Actions). Bringer turns invisible and moves up to his movement speed without attacks of opportunity. Bringer regains 20 hit points when he turns invisible. 

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

Void Bubble (Costs 3 Actions). Bringer hibernates into a thin bubble of shimmering gold. the bubble has an AC of 20, 100 hit points, and immunity to all damage types except for force damage. Bringer regains 10 hit points for every turn that he remains in the bubble. Bringer can attacks and make movements normally while within the bubble.

Murmur (Costs 4 Actions). Creatures within 30ft of Bringer must make a DC 25 dexterity saving throw or take 52 (8d12) force damage and are paralyzed by the sands. On a successful saving throw, the creatures take half damage.