Anti Enderking

Never Back Down. (1/Long Rest) When Anti is reduced to 0 hit points, he instantly regains 5. He now has a disadvantage on Strength and Constitution ability checks and saving throws until he takes a long rest.

Unbreakable. While Midnight's Edge is in Anti's hands, all damage dealt to it, such as chipping, or any other forms of wear, instantly repair themselves. The blade is always razor sharp. If the blade somehow shatters, it instantaneously reconstructs itself back on the hilt. 

Pommel Strike. Melee Weapon Attack: +9 to hit, reach 5 ft., 1 target. Hit: 3 (1d4 + 2) bludgeoning damage. On a critical hit, this attack knocks the target prone.

Midnight's Edge. Melee Weapon Attack: +7 to hit, reach 5 ft., 1 target. Hit: 8 (1d8 + 1d12) slashing damage. 

Dagger Of The Aether. Melee Weapon Attack: +7 to hit, reach 5 ft., 1 target. Hit: 3 (1d4) piercing damage plus 4 (1d8) radiant damage.

Skyward Blade. Anti jumps up to 15 feet into the air and makes one Midnight's Edge attack midair. He takes no fall damage when he makes contact with the ground again.

Eternal Slash. (Recharge 2) Anti swings his blade in a crescent in the are in front of him. the crescent is 15 feet long and 5 feet wide. All creatures in the crescent must make a DC 13 Dexterity saving throw or take 19 (2d12) slashing damage.

Ruined Citadel.  (Recharge 2) Anti thrusts his blade into the ground, creating a shockwave that extends 45 feet in all directions. All creatures in this area must make a DC 18 Dexterity saving throw or take 17 (2d10) force damage.

Aether's Purification. (Recharge 3) All effects are removed from Anti and all creatures within five feet of him. He and the creatures also gain an advantage on attack rolls, saving throws, ability checks and get a +5 to their total AC until the end of their next turn.

Underworld's Upheaval. (Recharge 4) Anti makes an attack with his blade. If the attack hits, 1d4 + 1 phantom blades appear and make attacks against that creature. These blades 5 (1d8) slashing damage and 2 (1d4) fire damage. All of these blades attack at the end of Anti's turn.

Parry. When an attacker hits Anti with a melee attack and Anti can see the attacker, he can roll 1d8 and add the number rolled to his AC against the triggering attack, provided that he has Midnight's Edge drawn.