From publisher blurb:
Vampirism, a curse of undeath in which the victim is driven by the overpowering thirst for the blood of the living, is certainly that - a curse. Despite being relegated to the gloom of the night, fearful mortals still refuse even to utter the names of these infamous creatures. Not bound by the whims of a warlock's patron, nor the sleepless path of study by wizards, vampires tirelessly master the arcane arts, bending even magical power to their inexorable charm. Their machinations are all their own, and for this reason, some mortals seek out the vampire's kiss. Those who survive these encounters will find themselves reborn into a new world of shadow, host to unimagined power in a new undead form.
Expanding upon the mechanics of the 5E Sorcerer class, this PDF allows you to create vampiric characters. Sorcerers with the vampiric bloodline gain vulnerability to sunlight, but also the ability to use their comrades' (or victims') hit dice to gain temporary hit points, and later the ability to use your sorcery points for vampiric transformations and to magically regenerate your wounds.