You are part of a court of elitist Vampires who would think themselves the purest blood vampires. they only bestow there curse on there servants that serve them as well as train there physical body to inhuman levels and there souls to the point where they can control the cured blood of vampirism.

Vampirism

You are now a fledgling vampire you training of your body and life energy give you control over your body and mind as a result gain only a few drawbacks from vampirism you gain vampire teeth, weakness to sunlight, and a lust for blood. 

Bloodlust. If you start your turn with fewer hit points than half your hit point maximum, you must succeed on a DC 8 Wisdom saving throw or move directly toward the nearest creature and use the Attack action against that creature. If you’re concentrating on a spell or are under an effect that prevents you from concentrating (such as the barbarian’s Rage feature), you automatically fail this saving throw.

Bloodlust

If you start your turn with fewer hit points than half your hit point maximum, you must succeed on a DC 8 Wisdom saving throw or move directly toward the nearest creature and use the Attack action against that creature. If you’re concentrating on a spell or are under an effect that prevents you from concentrating (such as the barbarian’s Rage feature), you automatically fail this saving throw.

If you have your Extra Attack feature, you can choose whether to use it for this frenzied attack. If more than one creature is equally near to you, roll randomly to determine your target. Once your attack is resolved, you regain control of yourself.

Shadow Step

At 6th level, you gain the ability to step from one shadow into another. When you are in dim light or darkness, as a bonus action you can teleport up to 60 feet to an unoccupied space you can see that is also in dim light or darkness. You then have advantage on the first melee attack you make before the end of the turn.

Ki Drinker

If you reduce a enemy creature to 0 hp and they have blood and are mortal you can drink deep from there blood restoring a single ki point, in addition your bite is now magical for the purpose of bypassing resistance, it also now forces the enemy to make a constitution savings (DC=8+PB+Wisdom modifier) throw deals a additional marital arts die of necrotic damage on a fail and half that on a success.

Immortal Blood

At 17th level, You gain a flat hp regen at the beginning of every one of your turns equal to {{2*modifier:con}}