Souleater

You have learned to divert your own life force to consuming the souls of your enemies

Blood infusion

When you reach 3rd level, you gain the ability to bleed yourself in order to infuse an enemy soul with it,  when you make a successful attack against an infused enemy you gain 1d4 temp hp

Increase Power

After a successful infusion, you can consume all pieces of the enemy soul in order to increase your strength or dex by 2 for 1 minute

Decrease Power

After a successful infusion you can tear the infused pieces of a soul from your enemy to decrease their strength or dex by 2 for 1 minute

Consumption Of Life

You can use an action and bonus action to consume a piece of a targets soul to reduce their max hp by 2d8+Strength and in turn gain 2d8+con temp hp 3/day 

Devour

You gain the ability to create a bloody maw by sacrificing 1d6 max hp which lasts for 1 minute it can do the following actions as a bonus action on your turn

Bite: 2d6+2 +3 to hit. Gain 1d4 temp hp

Clench: Attempt to restrain the enemy

Soul Rend

Sacrifice 1d10 max hp to make your weapon ethereal for 2 turns. It gains +5 to hit and deals an extra damage die worth of damage. Crit on a 19 as well.

Your blade strikes the soul directly ignoring most armor

Tear

Directly tear a targets entire soul from their body and hang it in the air. The target takes 2d10 force damage and attacks against it have advantage until the victim succeeds on a saving throw at the beginning of their turn (10+wisdom+proficiency) 

Every time they fail a save they take another 2d10 increasing damage by 1d6 for each time it happens

Souleater

Sacrifice 1d10 max hp to rip a targets soul from their body and absorb it to increase your strength or dex to 24 for 1 minute and deal 2d10 psychic damage to the target

Any enemy who witneses the devour must make a dc15 con save or be feared of you for the duration