School of Blood

While forgoing a blood ritual Orcus granted Kazin the ability to manipulate blood to his will, extracting it from peoples bodies, combining it with others and giving it certain effects. 

Necromancy or Transmutation Savant

Beginning when you select this school at 2nd level, the gold and time you must spend to copy a necromancy or transmutation spell into your spellbook is halved.

Manipulate Blood

Once per short or long rest your connection to blood allows you to manipulate it to your will, enabling you to cast one of the spells, charm person, hold person, after a fail wisdom save you can move them up to 15 feet in any direction, calm emotions, fear, blindness/deafness, cure wounds, phantasmal force or sleep at their lowest levels. At 6th, 10th and 14th level use can cast it 2 extra times. 

Control Blood

You can create one of the following effects in your target's blood.

Shock Blood:- You deal 2d10 lightning damage and the target must make a constitution saving throw or be paralyzed for 1 minute
Boil Blood:- You deal 2d10 fire damage and the target must make a constitution saving throw or be effected by the confusion spell for 1 minute
Freeze blood:- You deal 2d10 cold damage and the target must make a constitution saving throw or they are effected by the slow spell for 1 minute
Extract Blood:- You deal 4d10 necrotic damage and the targets hit-point maximum is reduced by this until they receive a greater restoration spell

This damage is increased by 1d10 and the spell level goes up by 1 at 10th and 14th level.

Rejuvinate or Poison Blood

You can spend your action forcing a creature to make a constitution saving throw either healing you or an ally all of their hit dice + your intelligence modifier or damage an enemy 1 half of their hit dice + your intelligence modifier and they gain the poisoned effect.

Create or Destroy Blood

You can cast the spell revivify once per week and learn the spell combine corpse. As an action once per short or long rest you force a creature make a constitution saving throw or their blood begins to vaporize and pours out of their orifices as steam. they take 3d12 necrotic damage per turn until they die or the caster loses concentration. A creature killed by this effect can only be brought back by an effect which makes them a new body. You can also create a blood spirit a number of times equal to your constitution modifier.