Douran Bloodhunter Canon
The first of the Celestial Hunters made a pact with the Lady of Good Blood. By accepting her divine blood, they became the first Aasimar. Over the centuries, people began to experiment with blood magic, other would be Hunters would make pacts with different beings and reap the rewards. Some took a more scientific approach creating mutagenic transfusions from the essences of various monsters and beings to gain their power. Eventually, the conflicting ideologies and practices of these orders began to bring them into conflict with one another.

The most Prominent Bloodhunter Orders (in order):
The Celestial.
	They get their power from a transfusion from the royal line of Douro. Because of their unbroken lineage to the Lady of Good Blood, the ruling monarch is regarded as her vessel on Earth. The Lady of Good Blood is an ancient goddess, worshiped mostly by the Aasimar aristocracy, Celestial Bloodhunters and select few paladins and clerics. Outside of Bloodhunter circles, she is mostly remembered for being the patron goddess of Aasimar, her specific myths are shrouded in mysticism.
They Celestial hunters are headquartered in the castle Desvio overlooking the river just north of the city of Sintra. They have small bases of operations in major cities for logistical convenience. These bases are secret though members are permitted to bring close companions.
	There are no more than a few dozen Order members at any given time. Every member is acquainted or at least knows of other Order members except for students. When accepting the transfusion, it is safest do it young. Most people join the Celestial ranks as children, with about 1/3 kids surviving the hunter’s rite and the survival rate getting lower with age. Students train with a mentor in the user of martial weapons and study the physiology of monsters of all kinds for a few years. In the later years of their training they shadow their mentor on hunts, before being free to operate alone at 18. They make a living hunting uniquely dangerous prey, and adventuring. People bring their monster related grievances to the Order, who negotiate a contract before the hunt.  Very few hunters live to seniority without being retired by injury.
The general public has some misconceptions of bloodhunters, mostly not being aware of distinctions of the other factions. Some people know Celestial hunters can be counted on to fight evil. Others are frightened by tales of the mutants and fiends or rumors of a cult practices. Generally, people are more accepting of bloodhunters when they’re in need of their services.

The Mutant (Chimera).
	They brew mutagenic transfusions by harvesting essence from monsters and people. They were infamous for their cruel experiments and their hideous mutated bodies. No two Chimera Hunters look the same, as their bodies twist to resemble the creatures who’s essence they have imbibed. The practices of their order were well documented since their was no otherworldly patron to supply them with power, all their mutagens were invented, with new recipes constantly being made and popular ones being recorded.
The Archfey
The Fiend
The Undying
The Great Old One
The Hexblade

Bloodhunter Purge:
About 20 years ago in Sintra, the holiest city on this continent there was an outbreak of White Blight, a terrible disease that causes sores with white bile, blindness, and eventually renders victims comatose. Unable to contain the outbreak, the Duke of the city hired the Order of the Fiend, who were renowned for stopping an undead outbreak before to help contain the disease. In their zealotry they burned old town and murdered the lesser nobility of the city.
Furious at the loss of his vassals, the Duke hired the only thing that could fight the Fiend Order-other bloodhunters. The other bloodhunter factions began to ally with each other and the conflict escalated beyond Sintra, culminating in the victory of the Celestial, Archfey, and Old One orders, with all the others being destroyed or driven to obscurity far from Douro.