Following ritualistically offering their heart to a Black Sun Relic, a creature's life and soul are no longer their own. They now have the following traits:

- Following offering their heart to the relic and getting revived, the vampire's alignment instantly becomes evil. Their other alignment, such as lawful, chaotic, or neutral remain normal. 

- Whenever the vampire reaches 0 hit points and fails all their death saves the vampire does not cease, but is instead drawn back the the relic they offered their heart to. There the relic forcefully revives them, creating an exact clone of their body at half their max hit points and without 1d4 days of their most recent memories. This can only be prevented by destruction of the vampire's soul, which can be done with certain magic items and spells. Other items that would try and absorb or catch the vampire's soul fail to do so.

- Any spells that reveal magic such as Detect Magic, unless the vampire is wearing an item that obscures magic cast on them or prevents scrying, reveal a tether of enchantment and necromancy attached to the vampire that drifts off into the distance, eventually leading back to the Black Sun Relic.

- Any effects that would dispel curses or magic have no effect on the Black Sun's Curse. Only powers that can twist reality itself such as the Wish spell can break the curse upon the vampire. Doing so does not cause them to age, but they will still die.

- These traits are only active if the Black Sun Relic the vampire is associated with is unbroken. If the relic is ever destroyed, a task that proves difficult for most, all vampires connected to it are forced to roll a d100, and on any number below 100 cease to exist, their bodies petrifying into a black, crystalline substance.

When determining your character’s ability scores, increase one score by 2 and increase a different score by 1, or increase three different scores by 1. You can't raise any of your scores above 20.

You can speak, read, and write two languages of your choice

You are a Undead.

You are Medium or Small. You choose the size when you gain this lineage.

Your walking speed is 30 feet.

Thanks to your heritage, you have superior vision in dark and dim conditions. 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.

If you replace a race with this lineage, you can keep the following elements of that race: any skill proficiencies you gained from it and any climbing, flying, or swimming speed you gained from it.

- If you don't keep any of those elements or you choose this lineage at character creation, you gain proficiency in two skills of your choice.

You have resistance to necrotic damage.

You can drain blood and life energy from a willing creature, or one that is grappled by you, incapacitated, or restrained. Make a melee attack against the target. If you hit, you deal 1 piercing damage and 1d6 necrotic damage. The target’s hit point maximum is reduced by an amount equal to the necrotic damage taken, and you regain 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.

When you drain blood with your Bloodthirst ability, you experience a surge of vitality. Your speed increases by 10 feet, and you gain advantage on Strength and Dexterity checks and saving throws for 1 minute.