Dark Knight

You have delved into the dark power of life giving your attacks boosted power at the cost of your own life force.

Blood Blade

You may sacrifice any amount HP to your current HP. Your attacks this round deal bonus necrotic damage equal to half of the amount you sacrificed.

Grave Touched

You have delved into the effects of life to the point where death has blessed you. You gain immunity to necrotic at the cost of being vulnerable to radiant damage.

Blood Barrier

When you are attacked you may use your reaction to sacrifice HP up to your Constitution modifier. Until the start of your next turn, you gain AC equal to the amount sacrificed.

Attack the Veil

When you use Blood Blade you bypass any resistance or immunity to necrotic damage.

Blood Frenzy

Once per long rest when you use Blood Blade you can add all of the sacrificed hp to your necrotic damage instead of half.