Your Strength, Dexterity and Constitution scores each increase by 1.

Vampires are immortal and can be any age. Vampires retain the physical appearance of the age at which they were turned at during their mortal life. They also retain the psychological development associated with that age, therefore vampires who did not reach adulthood in their mortal life may still have the impulses of an adolescent in their vampiric life.

Young vampires may keep the lawful, neutral or chaotic alignment they had in life, however, older vampires almost always lean towards lawfulness, usually following a code of their own design that they've developed over the centuries to ensure their survival. The vast majority of vampires are lawful evil. 

Vampires are the size of their original body, though they are normally lighter then they appear. Your size is Medium.

Because of your abnormally dexterous body, your base walking speed is 35 feet.

You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can't discern color in darkness, only shades of gray.

You can speak, read, and write Common, one language you knew in life, and one other language of your choice.

Your creature type is considered to be both humanoid and undead. Dark magic sustains you, making you resistant to necrotic damage. Healing magic and potions do not have a healing effect on you. Instead, potions deal poison damage equal to the amount that was meant to heal. Healing magic deals radiant damage equal to the heal amount. To heal you must either drink blood, spend hit dice, or finish a long rest.

Even though you are undead, you still require sustenance in the form of blood to sustain your unholy existence. You are immune to diseases. You do not need to eat or breathe, but you can ingest food and drink if you wish, though this food is always bland and stale to you. If you go for longer than seven days without drinking at least one ration of blood, you suffer one level of exhaustion on the midnight of that day, which can only be removed by drinking a ration of blood. After consuming one ration of blood, you recover all levels of exhaustion. If you reach six levels of exhaustion due to this trait, you are destroyed.

A ration of blood is a vial, roughly 4 ounces and while that is just enough to sustain you each week, you still feel the urge to drink and may still appear twitchy or ravenous in the heat of battle or when treating a wounded ally. A pint, such as that contained within a flask is considered a healthy amount, enough to keep you sustained while also suppressing your less civilized behavior. Each ration of blood heals you for 1d4+1 hit points while a pint will heal you for 2d4+2 hit points.

All vampires have sharpened teeth capable of tearing flesh from bone and draining blood from the body. If a willing, paralyzed, charmed, incapacitated, restrained, or grappled, creature within 5 feet of you has blood, you may use your bonus action to Bite them dealing 1d6 piercing damage and draining their blood dealing additional 1d6 necrotic damage. The target's hit point maximum is reduced by an amount equal to the necrotic damage taken, and the vampire regains hit points equal to that amount. The reduction lasts until the target finishes a long rest. The target dies if this effect reduces its hit point maximum to 0. Drinking blood this way is equal to consuming a ration as per your Blood Drinker trait. When you use your Bite, you can choose to not deal damage.

As a vampire you have a set of claws, your claws are natural weapons, which you can use to make unarmed strikes. If you hit with them, you deal slashing damage equal to 1d4 + your Strength or Dexterity modifier.

You can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check

A vampire’s reflection in silver (including a silver-backed glass mirror) appears as the vampire would have looked without the vampiric condition—neither its true appearance nor its glamor, but a normal human, flaws and all. For that reason, vampires go to great lengths to avoid mirrors, and the presence of silver in any form is unsettling to them.

Although vampires can be incredibly strong, their curse still comes with several notable drawbacks. Regardless of if you are a vampire spawn or a true vampire, you are affected by the following weakness unless specified otherwise:

• Forbiddance: You can't enter a residence without an invitation from one of the occupants.
• Running Water: Your flesh is torn apart in the presence of water, you take 20 acid damage when you end your turn in running water. This damage may not be reduced in any way.
• Stake to the Heart: If a piercing weapon made of wood is driven into your heart while incapacitated in your coffinic structure, you become paralyzed until the stake is removed if you are a true vampire. However, if you are a lesser vampire, you are instead destroyed.
• Sunlight Hypersensitivity: You sear and burn in the light of the sun, your flesh immolating. If you end your turn in direct sunlight, you take 20 radiant damage. You also have disadvantage on any attack rolls and ability checks when in direct sunlight.