Path of the Haunted Soul

When this fighter kills someone in combat, their souls loom around them, haunting them, tearing them apart and driving them mad. This causes for some cool abilities at the expense of the sanity of the user.

Bloodlust

While you are raging, when you reduce a foe's hit points to 0, you can use your bonus action to move again and/or attack again, or as a normal bonus action. You can do this twice per long rest. After you do this, roll a DC 12 Wisdom Saving Throw. On a fail, you have disadvantage to hit on your next turn.

Empty Thoughts

Beginning at 6th level, you can’t be charmed or frightened.

Corrupted Soul

When raging, you become a corrupted form of yourself, as you let the spirits take over. All foes must make a DC 15 Wisdom saving throw or be frightened by you. Your appearance, voice, and personality can shift during the rage. 

Seeker of Vengeance

Starting at 14th level, when you take damage from a creature that is within 5 feet of you, you can use your reaction to make a melee weapon attack against that creature.