Vampiric Curse

You have been bitten by a Vampire or otherwise been gifted with the Vampire's Curse. Cursed to stalk the night forever, you are stealthy, though intrinsically weak to sunlight, your primary weakness. As a reward, however, you gain phenomenal feats of regenerative power linked to your blood drinking. If you refuse to sate this appetite, however, you could starve. 

You do not need to sleep or eat, though going one full day without drinking at least 2 liters of blood, or 1 liter of humanoid blood, gives you 1 Level of Exhaustion.

You have disadvantage on attack rolls and on Wisdom (Perception) checks that rely on sight when you, the target of your attack, or whatever you are trying to perceive is wholly within bright light. When you start or end your turn wholly within bright light, you take an amount of Force damage equal to your current level. By covering your skin entirely, you can avoid this damage. You are also Vulnerable to Radiant damage  

You also gain the ability to drink blood in order to regenerate health. As a bonus action, you bare your fangs and attack a creature (must have blood) within 5 feet with an unarmed attack. You can use strength or dexterity as the modifier for this attack. The attack deals 1d6 plus your Strength or Dexterity modifier Piercing damage and you heal the same amount. That creature must make a Constitution Saving throw or be Poisoned for 10 hours. This attack deals more damage when you level up. At level 10, it deals 2d6 plus Strength or Dexterity. At level 16, it deals 3d6 plus Strength or Dexterity, and at Level 20, it deals 4d6 plus Strength or Dexterity. You can successfully hit a creature with this attack a number of times equal to your Proficiency Bonus per day. By using this attack, you drink 1 Liter of blood from that creature.

Lastly, your Vampiric powers give you the ability to charm and befuddle those around you. You know the Charm Person and Suggestion spells. A number of times per day equal to your Wisdom modifier, you can cast one of these spells at their lowest level for free. The Spell Saving throw for this is equal to 8 + your Wisdom modifier + your Proficiency Bonus.