You can invite necromantic energies into your body. As a Bonus Action, you can gain the benefits below for 1 minute or until you choose to end them (no action required). Once you use this feature, you can't use it again until you finish a Short or Long Rest.
Frightful Aura
You emit an aura of terror in a 15-foot Emanation originating from yourself. Whenever an enemy starts its turn in the Emanation, it must succeed on a Wisdom saving throw (DC 8 plus your Constitution modifier and Proficiency Bonus) or have the Frightened condition for 1 minute or until it takes any damage. Attack rolls against the Frightened creature have Advantage.
Vampiric Strike
As a part of the Bonus Action you take to use this feature, you can cast Vampiric Touch without a spell slot as a level 5 spell. When you take the Attack action, you can replace one of your attacks with making the spell's melee spell attack.