The Forbidden way is the way that break all law and harmony. These practitioners are shunned and avoided due to fear of their abilities. They can manipulate ki to break bones on command and pull blood from bodies. Their power is all they have, no morals no worth no life.

Blood weapon

Channeling  your ki into one of your limbs your rip you your blood out snd turn it into a weapon. there are three weapon options. You can also pull blood from another willing creature. The weapon lasts for 10 minutes

1. Short sword: deals 1d8 damage to summon a sword of blood

2. Dagger: deals 1d6 damage to summon a dagger of blood

3. dart: for every d4 of damage 4 darts will be summoned 

transfusion

By doing enough harm to yourself to cause blood to spill you deal a d6 of damage and use you discipline you have learned to make the blood flow to some one else as the blood touches their body it moves to their wounds and closes them healing for as much damage that was caused. 

Bone bending

You choose a creature in a 10 foot vicinity to reform there bones or you affect yourself. If you choose to target any creature other than your self they will have to make a saving throw against your ki save dc. on a failed save you can 1 ability and the things that  can happen are 1 you can weaken a bone in their body for 10 minutes causing disadvantage on all strength checks including saving throws and all dexterity checks including saving throws. 2 you can cause a bone to malforme and stretch out of the body for 3 rounds dealing 1d6 puncture damage and give disadvantage on all saving throws. If you choose to target your self you can either extend your bones out of your body dealing 1d6 puncture damage and use as a weapon for 5 rounds. or you can strengthen you bones to gain advantage on strength and dexterity checks and saves for 10 minutes. on a successful  save nothing will happen

Bloodletting

you channel your energy into three hostile creatures in a 10 meter radius and force them to make a saving throw against your ki save dc or take 2d12 necrotic damage causing blood to gush forth from their bodies. on a successful  save they take 1d10 necrotic damage. being hit by the blood needs a constitution saving throw or take 1d6 acid damage.