Very few know true vampirism one source is the Nyarlathotep Order of the Black Dragon in which you can found internal alchemy but this order is a “closed door order”.For them a potential vampire ignores his true state as it is buried in the depth of his psyche and adherence to the order allow to him to have access to his true identity. They do a full deconditioning followed by a process of regeneration it is the way to becomes an authentic vampire.
Everybody have beliefs, fantasies and self restraint, the process is hard to destroy them and access the true being.
The process itself is related to the triple mystery of the resurrection of the spirit, soul and body in order to assure the Adept the conditions of long life and immortality of consciousness after the death.
And don’t be confused here this is a true transmutation far beyond the magical techniques found elsewhere, this is hard way.
In this order they have linked or used the Nyarlathotep as the symbol of the possessor of the primordial chaos mysteries.The only author who have been initiated to this order is know under the pen name" René de Lhamort" according to him the followers of this fraternity are “put to death” in the Kingdom of Xibalta, the underworld of Darkness. This death of the initiate fertilise the Underworld and allows him, in return, to be resurrected by the Lords of Death. This resurrection is the realization of the immortal body of the Black Sun. Through this body, the adept reaches a supra consciousness which grants him the power to be reborn consciously in another human form. His immortality consists of chaining lives to each other punctuated by periods of rest without the Invisible. In Europe, the author followed the teachings of the Order of the Black Dragon of Nyarlathotep, also called the Bat God of Death. In the Amerindian tradition, he is named Kamazotz.
There is also 2 other Black Order of the Dragon first one is well known today as this the Order founded by Michael W Ford but there is a secretive one called the Transylvanian Black Order of the Dragon who use a special initiatic system and use a gate into the Vlad Tepes/Dracula symbols/pictures to use them as gate to call undead god who can be possibly very dangerous if the adept has not properly trained himself, this undead being who will enter into the adept, the transmutation will occur quickly but the adept will have to hunt often in order to stabilize his new state and do other workings.
Into Morphosephram, William Wraithe teach something very similar through the evocation of Mobloch who will send a sort of void entity of his void legion to merge it into the magician.
Finally the book Sacerdotium Umbrae Mortis teach also a process of Infection, Death, Descent, and Revenence through the evocation of the most malevolent side of the Qliphoth, this is interesting system but arthurian current is overcomplicated in my opinion and need much simplification.
I have some great personal effect through some of these systems and try do go further that’s why I have write that I seek some missing keys for the vampiric alchemical process. I have some of them into my native language ( unfortunately not translated into other as the author has disappeared) and most of the other are easily found into books that I have quoted into this thread.