Death Bringer

Starting once you pick this subclass you feel an insensible need to kill all of your enemies.

Bloodlust

Bloodlust is a feature that forces your character to go on a murderous rampage.

To resist this the player must concentrate on the first turn of combat. If concentration is broke the player cannot attempt to gain control again until out of combat. The player must kill every opponent in combat. If all opponents are killed the player must try to regain concentration but if not regained the player will start attacking any living thing. If you are restrained you get advantages on Constitution saving throw.

Bonuses:
while bloodlust is active all the damage you take is totaled up and dealt all at once at the end of combat.

Bloodlust+

You begin to gain control over your bloodlust.

You now have advantage on Constitution saving throw

Bonuses:
while bloodlust is active all the damage you take is totaled up and dealt all at once at the end of combat.
while bloodlust is active you have advantage on all attack rolls.

Control

You gain control over your bloodlust.

You no longer have to make concentration checks to resist bloodlust but you still need to make them to exit the ability.

If you get last hit on any opponent you can subtract half their health from the damage you'll take at the end of combat.

Bonuses:
while bloodlust is active all the damage you take is totaled up and dealt all at once at the end of combat.
while bloodlust is active you have advantage on all attack rolls.
while bloodlust is active your movement speed is doubled.
while bloodlust is active you have guarantee critical hit on any opportunity attack.

Utilization

You have better control over bloodlust.

You can now enter bloodlust whenever you want but you have to exit at the end of combat with no checks.

Bonuses:
while bloodlust is active all the damage you take is totaled up and dealt all at once at the end of combat.
while bloodlust is active you have advantage on all attack rolls.
while bloodlust is active your movement speed is doubled.
while bloodlust is active you have guarantee critical hit on any opportunity attack.
while bloodlust is active you gain advantage on all intimidation checks and are immune to being intimidated.

Brutal Kill

You have full control over bloodlust.

you can freely activate bloodlust and exit whenever you want with no checks.

Bonuses:
while bloodlust is active all the damage you take is totaled up and dealt all at once at the end of combat.
while bloodlust is active you have advantage on all attack rolls.
while bloodlust is active your movement speed is doubled.
while bloodlust is active you have guarantee critical hit on any opportunity attack.
while bloodlust is active you gain advantage on all intimidation checks and are immune to being intimidated.
If bloodlust is active you can use Brutal Kill with double advantage.