Corrupted Undead Champion - Fallen Lord

Corrupted Warrior's Will. Fallen Lord is immune to frightened status.

Crystal Empowered. Fallen Lord is bound by 3 magical crystals:
1)On the crown (27 HP AC 15)
2)On the torso (44 HP AC 16)
3)Within his mouth (24 HP AC 18)
These crystals provide him additional powers. When destroyed Champion receives force damage equal to the HP of the crystal. Moreover he looses ability associated with the crystal and receives debuff for the rest of the fight. 
1)Crown - Can no longer use Aura of Despair and gain temporary HP through Undying Constitution.
2)Torso - Can no longer use Behemoth's Charge and Retaliate. Moreover its movement speed is reduced to 30 feet.
3)Mouth -  Can no longer use Negative Energy and Bleeding Wounds.

Fallen Lord may attack on his turn in following ways:

1) Multiattack. Champion makes two melee attacks.

Corrupted Greatsword. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) (1d6+5 slashing and 1d6 necrotic)

2) Behemoth's Charge. Champion runs 15 feet in a straight line dealing damage and knocking enemy 10 feet away.

Unstoppable Force.  2d6+5 Damage DC 16 STR saving throw. On succes target receives no damage, but is knocked 5 feet away instead of 10 feet. 

3) Negative Energy. Champion slams his greatsword into the ground, charges it with negative energy and then sends the charge in 30 meter radius around him.

Freezing Hatred. 16 DC WIS saving throw. Enemy receives 2d6+6 cold damage and their movement speed is halved. On succesful save damage is halved and movement speed decrease does not occur.

Undying Constitution.  Until the end of his next turn Fallen Champion stores a percentage of damage dealt to him (50% rounded down). He may release the charge as reaction Retaliate or gain temporary HP equal to the charge.

Retaliate. Champion releases stored charge while attacking in 15 feet wide cone. Enemies who succed in 16 DC DEX saving throw receive half damage. Damage dealt is necrotic damage.

Aura of Despair(1 turn cooldown). Fallen Lord creates aura around him that lasts till the end of his next turn. All enemies within 20 feet of him must succed charisma saving throw (DC 17) or become frightened. Effect ends after one turn. 

Bleeding Wounds(1 turn cooldown). Champion can cause all creatures within 30 feet of him to bleed from wounds. Each creature in area that does not have full HP receives 2d6+6 slashing damage if they failed 17 CHA saving throw or half on succesful save. This effect bypasses all resistances and damage reduction effects.