The major demon practitioner (let's call him michael) instantly transported the kid (let’s call him peter) to his den he then taught peter the rules of the den

1. Don’t fuck me on anything

2. Don’t steal my shit

3. Don’t lie to me

After putting down all these rules michael starts talking about all that peter's gonna learn. I of course make sure peter’s listening intently. I also burn every word michael says into peter’s head.

I of course also have info coming in from my other half in michael head. So I get both sides of the conversation. While peter was adapting to his new circumstances on the fly, michael was having the time of his finally getting someone he can teach.

Michael taught peter how a demonic cultivators life is full of loneliness. No friends no family nothing, all because everyone's fears you. Of course he also hinted at the fact that most demonic cultivators go crazy because most cultivation techniques force you to house demon souls in your body and as you can tell demon souls are really to the mind.

While of course I can mitigate the damage, the kid needs to grow by himself in some things while other things i can help him with like focus and meditating on the technique that michael is teaching him.

The technique is basically just shoving the worst demon souls you can find then doing horrible things to feed the demon souls. Basically you need to make your soul as comfortable as possible for the demons. The stronger the demon souls are the stronger you’ll be.

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Of course the boy's soul is already pretty black. So he’s gonna have an easy time in this cultivation. (of course this was thought out I, mean duh I just matched the boy with his optimal master and cultivation).

Michael gives peter 3 months before he gives him a vile demon soul. 3 months to straighten out his mental state. I of course would help him out in this by cleaning his mind. I am also giving him breathing techniques, focus and concentration. All of this without him having a semblance of knowledge that I exist. I do this by making him think that he thought up all the brilliant things I’ve been filling his mind with.

2 month time skip

1 month until peter gets his demon soul. It's been a sorta crunch for me getting everything in order. Everything in his conscious and subconscious look to be running smoothly. The kid is of course still a stone cold monster that would do anything for power but you know relatively good.

His master michael isn’t doing anything to help peter of course. This is kinda like an initiation test. To see if he can handle it or not. Michael of course has the utmost confidence that peter was gonna survive. So did I.

Initiation

Today was the day, peter was gonna make it today. Today is a make or break day. Michael gets peter prepared. He gets peter a blood covered robe just for this occasion. Peter of course doesn’t bat an eye, although he is slightly disgusted with the robe.

Michael gets peter into a room full of matches. In the center of the room there is a big dark crystal. In this crystal as you’ve all guessed by now is the demon soul.

I tear a chunk of myself off to scout ahead in the soul. Boy o boy is this demon nasty, strong, but nasty. The demon was berserker (one of the hardest souls to assimilate). Berserkers are usually evil pricks who’d rather die than give up on a fight. Of course there also some of the strongest demons in terms of soul because it takes a bunch of will power to carry on your literally knocking on death's door.

I do some last minute check-ups. Everything is in order. Peter is a bit frightened by the dark aura the demon was giving off but he was still holding out strong. Peter was strong I’ll give him that but he needs a few other things in order if he wanted to succeed in this path of cultivation. He was still pretty ready for this fight.

Michael pushes peter towards the crystal. The crystals demonic aura seems to get bigger somehow. Maybe it was excited by the arrival of a new opponent. Peter gets right in front of the crystal. He then slowly puts his palm on the crystal, and the world exploded.