blood magic

while most sorcerers get there magic from there blood line you take it to the literal and use your blood itself for your magic 

Blood Focus

At first level you can use your blood itself as an arcane focus, but to use your magic your blood has to be out of your body so you must take damage, or you can make a small cut on your body as a bonus action. Doing so does 1d8 damage and if you are healed at all the slit closes and you must make another one.

Blood Surge

At first level once per long rest as an action you can heal your self 1d4 health per sorcerer level. You have a surge of control of your blood letting yourself heal some of your wounds.

Sacrifice

At sixth level as a bonus action you can turn your blood into magic energy and recover sorcery points. Doing this takes 10 health per sorcery point. You can sacrifice more health for more sorcery points per bonus action. Ex: 20 health for 2 sorcery points takes one bonus action.

Adrenaline

At fourteenth level you can make the blood in your body speed up giving you an adrenaline like effect, giving yourself advantage on all ability checks attack rolls and saving throws for a minute. Make a dc 15 con save or take a level of exhaustion.

Continued Control

At eighteenth level as you become more used to using you magic. You are able to control your blood better making the d4s in blood surge d8s.