Brooch of Sanguine Night

Wondrous item, very rare (requires attunement)

An elegant brooch with a deep red gem at its heart, embellished with aristocratic bombast. 

Blood Is Life. You can attack a creature with your fangs, which are a simple melee weapon with finesse with which you are proficient and deal 1d6 piercing damage. When you hit a creature with blood that is above CR 0 with this attack, you gain a blood die (1d8). You can only have a total number of blood dice equal to twice your proficiency bonus.

Sanguine Skills. You can utilize your blood dice to fuel the following vampiric abilities:

• You can use a bonus action to spend any number of blood dice and roll them, regaining hit points equal to the number rolled + twice the number of blood dice spent.

• You can cast the following spells by spending a number of blood dice equal to the spell level, using Charisma as your spellcasting ability: Charm Person, Gaseous Form, Hold Person, Misty Step, Spider Climb, Vampiric Touch. 

• When you hit a creature with a melee attack, you can spend any number of blood dice to roll them and deal additional necrotic damage to the target in addition to the weapon’s damage equal to the number rolled.

• You can spend two blood dice to transform into a wolf or a swarm of either bats, ravens, or rats as though by the polymorph spell. You can transform back to your original form using a bonus action.

Curse. This item is cursed and attuning to it extends the curse to you. You remain cursed this way until you die or until it is removed by magic of 7th level or higher. Your form becomes more vampiric, changing you in the following ways:

• Your creature type becomes Undead. 

• You take 1d8 radiant damage when you start your turn in sunlight. 

• When you finish a long rest, you lose 1 blood die. If you have no blood dice to lose this way, you gain no benefit from the long rest.

A lovely piece, is it not? The hardest part was finding a vampire willing to donate even a drop of their valuable blood, but I suppose I shouldn’t have expected a creature that lives off of blood to be generous with their own. It took some persuading, but once I had taken-I mean acquired enough from my generous benefactor I was able to understand the machinations of their curious magical properties. Unfortunately, I couldn’t quite grasp how to remove that pesky allergy to sunlight, but trust me; after a few millennia you’ll get tired of the dawn.