Order of the hellbound

Blood hunters of this order have searched far into the depths of hell to create their unique order dedicated to slaying the creatures that come from the evil realm, as well as other evils that plague the mortal realm

This means their use of blood magic is far more adept then other orders but also far more dangerous to not only others but themselves. Members are not concerned with the profits and glory for their deeds but rather commit to doing their duty as a member of the hellbound regardless of profit and gain.

It is believed the order was founded when a lone, novice blood hunter turned the tables on a rakshasas who was hunting him. Instead the hunter delved deep into the realms of hell to find and kill the creature once and for all. His close and personal experience with the darkest powers in the known multiverse is what helped him develop his unique technique taylored to fighting like fiend. though little is known about the joining of this order some believe that there is a certain deal with a particularly powerful devil involved, others suggest that the consumption of fiends blood is involved to truly absorb their essence, perhaps both play a part in this secretive order.

the price of joining this order is a steep one to pay, for it involves a ritual that bounds the hunters soul to the 9 hells through a blood ritual. Upon death the blood hunter is bound to fall to hell and suffer for eternity unless their soul can be saved.

Devour

Upon choosing this order the blood hunter learns how to manipulate an opponents own life force, to help regenerate ones own wounds. Causing the opponents blood to ripple under the skin until it rips out of multiple wounds and flows to you magically healing your wounds.

By sacrificing a hit die used in a short rest the blood hunter may take an action to use this to make a target within 30ft make a constitution saving throw (your spell modifier is wisdom). If the target fails the save they take 1d10 plus you wisdom modifier in necrotic damage and you regenerate for the equal amount of damage dealt or half as much damage dealt and recovered on a successful save. This attack doesn't work on enemies that don't have blood, like constructions. If you kill a creature with this attack you only regain hit points equal to the amount needed to kill, for example if the target has 7 hp left and you deal 10 damage with devour, you will only regain 7 hp.

when you reach level 6 you may spend up to 2 hit die to deal extra damage instead of just one dealing 2d10 plus your wisdom modifier, at level 10 you may spend up too 3 and at level 15 you may spend up too 4 additionally at level 15. At level 15 the attack does full damage to fiends regardless of resistances and immunities, even if they lack blood.   

Devils blood

Through accepting devils taint into your being, you are now able to cause enemies blood burn by embodying your fanatical resolve.

starting at 7th level you can activate this ability as a bonus action by taking damage equal to your rite die and reciting a unique phrase to the blood hunter. While active every creature with blood (including you and allies) within 10ft of you will take damage equal to your blood hunter level at the start of each of their turns, this includes if they move into the radius of effect on their turn until you dismiss it. This damage bipasses resistances and immunities to fire damage for devils and demons only. Enemies without blood take no damage

additionally now you have mastered the blood of the underworld, you can no longer be mentally controlled or swayed by fiends, only other creatures are still able to attempt to do so.

Crimson trace

evil creatures can no longer hide from the blood hunter once his mark has been set. This is a unique curse but does not go against the number of curses known to the blood hunter.

starting at level 11 when you hit an enemy, as a bonus action you may take damage equal to you rite die to place a crimson mark of blood on your target, the rite damage cannot be recovered until the curse is ended. This can only work on fiends or other creatures with blood. Once the mark has been laid the blood hunter can track the creature in close range. If the target is over 1mile away the hunter must spend 10 minutes on a ritual to locate the creature, but if the creature returns within 1mile range of the blood hunter then instantly knows where they are to a precise location. the blood hunter may decide at any time to release the curse.

you can only have one creature under this effect at a time and for the target, removing the mark takes time and no simple remove curse spell will work. Spells like wish or the use of god like powers will work however. 

Blood frenzy

The closer to death your blood hunter comes, the stronger they become as their blood is shed on the floor releasing their frenzy magic. As a result the blood hunters eyes glow a crimson red and a dark aura begins to surround him upon nearing death.

starting at level 15 when your character losses an amount of health described below they also gain advantage on intimidation checks in addition to what is described.

when you have lost half your hit points rounded up you gain +1 to attack and damage rolls as well as advantage on the first attack roll on each of your turns, until your hit points increase above half.

when you are down to 20 hit points or less you gain +3 to attack and damage rolls on your turn, additionally you gain advantage on all attack rolls you do until your hit points increase over 20.

 

Bleeding resilience

Constantly inflicting damage on your own body has made it sturdy and durable being able to fight after death granting some unique benifits.

you have proficiency with constitution saving throws and you can now add your constitution modifier to your death saving throws (if this results the number being over 20 treat it as a natural 20), on top of the following benifit.

when your blood hunter is knocked down to 0 hit points they can choose to automatically fail one of their death saves to take their turn. they recieve full benifits of their blood frenzy. If the blood hunter chooses to do this three times on the same death saves, he will inevitably die as a result.