Choose a method of creating more of your kind. You gain weaknesses based upon your choice.

You are able to feed on target's who possess blood when the target is willing, grappled, sleeping, or unconscious. Your bite deals 1d4 piercing damage initially. Each round thereafter, you may drain a number of HP as Blood Points equal to the highest of your strength or wisdom modifiers.

All ability scores except Wisdom increase by 2.

You no longer age and will live forever if not destroyed.

Vampires who satisfy their thirst on the innocent without remorse end up little different from traditional Vampires. Those who satisfy their thirst on those deemed deserving are often lawful. Those that feed only on animals can manage a good alignment, often lawful due to the self discipline required.

You start with a maximum Blood Pool equal to your Constitution score at first level. This pool of blood increases by one point each time you level up. This blood can be used to activate various supernatural powers at your disposal, though you may never use more Blood Points in a round than you have class levels. If ever your Blood Pool becomes lower than your(Constitution modifier + 1/2 your level) - your Wisdom modifier, you must make a wisdom saving throw every round to resist your overwhelming thirst with a penalty equal to your Constitution modifier + 1/2 your level - your Wisdom modifier subtracted by your current Blood Pool. The penalty increases each round by this number until you feed enough to bring you back above your minimum threshold, (Constitution modifier + 1/2 your level - Wisdom modifier.) If you fail, you attack the closest living being possessing blood with the intent to subdue and feed from the target.

You gain two supernatural powers at first level and one additional power at every odd level thereafter.

Vampires do not change in size from how they were as mortals. Your size is the same as your mortal race's.

Your base walking speed is 40 feet. Your swim and climbing speeds are 30 feet.

You can see in darkness (shades of gray) up to 120 ft.
Your senses are dialed to eleven. You gain advantage on Perception, Investigation and Insight checks.

You can speak, read and write the same languages you could in life. (Same languages as your mortal race.)

Healing magic deals damage to you equal to what it would have healed.
When you rest, you heal 1 HP per 10 minutes.
You cannot spend Hit Dice during rests without the Healing Blood ability.
Harming and necrotic magic heals you for the damage dealt.

Your connections to the material plane and the Shadowfell make you difficult to catch. Add your Charisma modifier to your AC to represent your seemingly immaterial form and add your Constitution modifier to your AC to represent how hard your flesh has become.