Blood Mages are sorcerers who have dabbled in the dark arts of blood magic, and have learned its secrets. They use Constitution as their spellcasting modifier. Blood Mages originate from a dark ritual before their birth, usually performed by their caretaker, or through discovering the craft through hardship or a lust for power on their own. Blood Magic revolves around sacrifice harnessing the power of blood to cast powerful spells. However, overindulgence in blood magic could result in a swift end. If a Blood Mage falls unconscious at the cost of casting a blood spell, they fail 2 death saves immediately, but can still be resurrected.

The Power of Blood

Whether through pain, desperation, or lust for power, you have found your way to the forbidden power of blood magic. Your Spellcasting DC now has an additional +1, and you get an additional 2 points in deception. The bags of blood they call "creatures" are in the palm of your hand. When interacting with a creature with blood, you may add your proficiency bonus to Charisma checks and to Animal Handling checks if you aren't proficient in them.

Blood Magic

You have learned to use your own blood to manipulate spells. Instead of using spell slots to cast spells, or spending Sorcery Points to apply Metamagic, you may instead expend your own health. The hp expenditure is equal to 1d10 hit points per sorcery point or spell slot. When you expend hp this way, your maximum hit point is reduced by what you spent until you take a long rest. If you’re knocked unconscious from this, you immediately fail 2 death saves. If you survive, you are restored to 10 hit points

Grim Sacrifice

Once per long rest, you can drain the health of up to 6 creatures with blood that you can see within 60 ft. of you. The targets must make a Con. saving throw or suffer 4d6+10 necrotic damage on a failed to save, or half as much on a successful one. You heal by half the damage dealt. You also can cast the spell vampiric touch once per long rest without expending a spell slot and does not count against your total learned spells.

Bloodlust

Once per long rest, as an action you can make the blood of up to 6 foes revolt, instantly killing creatures with less than 50 health on a failed Con. save. On a success, the targets take 6d6 necrotic damage instead of dying.

If used on a target with more than 50 hit points, it then deals 7d20+44 necrotic damage and falls prone on a failed con save, or half as much damage on a successful one.

However, the creature must have blood to be harmed.