Sanguine Bloodline

A sanguine sorcerer can be flavored in many ways, whether the result of vampiric influence whether by blood relation or circumstance of being a thrall, or a sorcerer with a gift unique even to others with inherited magic. Blood sorcerers have a unique and deep connection to hemoglobin allowing them to manipulate their own blood as well, for the most powerful users, manipulate the blood of others to their benefit. 

Blood manipulation

A Sanguine Sorcerers' strength comes from their unique ability to fuel their magic with their life force, making it more potent and dangerous. 

A sanguine sorcerer has an amount of "bloodletting"  dice, equal to their CHA modifier and they are d6's, they can use these dice to empower their spells and cantrips. 

A sorcerer can use one of these dice, whenever they cast a spell or cantrip that uses an attack roll. upon a hit inflict additional damage equal to the roll of the d6.

These "Bloodletting dice"  Replenish after completing a long rest or can be replenished by exchanging sorcery points with a 1 for 1 transaction rate as a bonus action. 

Coagulation

at 14th level A sanguine sorcerer learns the secret behind coagulating blood to bolster their body's durability. 

Whenever a foe that is not a construct, undead, ooze, or other creature that does not have blood, fails a saving throw against one of your spells, gain a number of temporary HP equal to half of your sorcerer level. The number of temporary hp you can have can equal but not exceed your sorcerer level. 

 

Blood Bending

at 18th level sanguine sorcerer has reached the pinnacle of the art form,  mastering manipulation of blood even inside the body of others.

as a reaction, you can use one of your bloodletting dice to enforce disadvantage against a saving throw from one of your spells, this reaction cannot be triggered by casting a spell.

 

Fortified Blood

At 6th level, sanguine sorcerers have stronger immune systems against poison and disease. 

you gain resistance against poison damage as well as have advantage against saving throws that would inflict the poisoned or diseased conditions.