Asyyal, The Ascendant

Immortal. Asyyal cannot fail a saving throw, take damage, be afflicted with conditions, die, be wiped from existence, or have anything happen to him unless he wants it to.

Spellcasting. Asyyal can cast all spells, without consequences, or material components, and can cast entirely new spells he creates. He can also cast spells as a bonus action, reaction, and interaction.

Titanic. Asyyal occupies a 80ft sphere.

Shapechanging. Asyyal takes on the form on anything he wants. He gains the actions, and proficiencies of the creature, but otherwise, his stats remain unchanged.

Power of a Deity. Asyyal makes 16 Tendril attacks.

Tendril. Melee Weapon Attack:  reach 10000 ft., 10 target. Hit: 100000 damage.  This attack automatically hits, and cannot have its damage reduced or increased in any way.

Asyyal has infinite Legendary actions. He uses his legendary actions at the end of any turn

Deity. Asyyal uses any action that any monster, creature, or the like possesses(He can use any action of anything that has a statblock). If said action had a recharge, and he attempts to use it again, it automatically recharges.

Work the same as Legendary

Enraged. Asyyal takes any Legendary or Mythic action that exists.