I appologize in advance for my essay-long post. please forgive me
I really hate asking someone to basically help me with ideas for my books but this has really stumped me for sometime now. My story revolves a lot around made up mythologies that I invented and so let me explain the story, and be aware I am omitting a lot of details to keep it short:
(and im still working with names so bear with me while I use these substitutions)
The Gods all wage eternal war with each other and the cities of Man are divided, each city having its own pantheon of deities. The Gods demand that Mankind worship them and threaten with damnation. One city is betrayed by their gods as they allow their enemies to slaughter everyone in the city as a blood sacrifice. The priests and survivors escape and flee to the arctic mountains north of their home.
During their journey they seek shelter and refuge from their attackers and the blizzard in an old stone building carved into the mounting. Once inside, the priests realize that they are in a Shrine of Demons. (A long time ago, one of the Gods and his followers were banished from heaven for using and seeking knowledge of forbidden black magic. The armies of Man lead a crusade to erradicate all shrines and teachings of this so that it would be removed from the Earth)
There they discover a bound demon trapped inside a cursed ring. The priests just saw their families butchered and burned while their gods abandoned them and allowed it to happen. They have hatred in their hearts against the gods but fear damnation to oppose them. The demon uses his deceit and guile to persuade them to sign a pact with the Dark God, tempting them with the allure of forbiden magic and life eternal from oblivion. And so to ensure their loyalty to the Dark God, they perform the ritual of Possesion. basically, the mortal allows his soul to be host to demonic influence. The demon latches itself onto the soul of the mortal and a bond is formed. The demon can now be in the mortal plane while the mortal's soul is linked to an eternal being, allowing them life eternal.
(There is a few year gap in between here, to allow the characters some time to become powerful with new sorcery)
The main character, Kreymar, becomes a servant of the Dark God and the demons. But during his searches to find other demonic artifacts and scrolls of perverse magic, he finds a book of Necromancy. This magic is very similar to the black teachings of their Dark Lord, except instead of using invocations to draw upon power, it shows that the power can be drawn upon from the Earth. Bbasically in this world, the only way to use magic is from the gods, but now Kreymar finds this book that will allow him to feed on souls to keep him away from death. Eventually he and his small cabal of followers will leave from the services of the Dark God, renounce their oaths of fealty and leave to unravel the secrets of immortality. They hope to one day become masters of death and lead an army of deathless warriors to eradicate the world of all religion.
Here's my problem:
I'm not sure how to make Kreymar and his followers learn the secrets of necromancy without the demons knowing. The magic is directly forbidden even from the Dark God himself and is the