Mr. Isaac immediately tried to speak but found no words, he couldn't fantom how a kid of Dan's age had an advance class core in his hands or how a demon was in his room and wasn't trying to bite his head off and after a whole minute of silence, the right word came to Mr. Isaac's mouth, "How?" he asked as his knees slightly buckled, "How?, it's simple. My parents gave me a summon as a birthday gift before they disappeared, I had kept it hidden to avoid unwarranted attention and as for the core I asked the summon to retrieve it." Dan lied through his teeth, 'Liar.' Night's voice said in Dan's head, 'Hey, I am not lying. My parents actually gave me the system which allowed me to get you. So technically, they gave me a summon' Dan said as a smug grin appeared on his face, "Interesting, in respect to your wishes, I won't tell anyone about your summon but the same doesn't apply to the core. I can't just let you keep an advance class core, it is literally an evolution away from being a king class, I won't collect it now but later." Mr. Isaac said as he walked away but abruptly stopped in his tracks, "I almost forgot again, your gauntlets, the one you wore when you went to hunt basic class demons, is with the headmaster as well." Mr. Isaac concluded before walking out and closing the door.
"So what are you gonna do?" Night asked Dan, "I am going to visit the library, so I'll need you to disappear." Dan responded as he went out of the room but not before noticing the rune filled formation that appeared on the ground around Night before it disappeared, 'Strange, I wonder how that works.' Dan thought as he walked through the halls and in a few minutes, he was in front of a double door with a carving that read 'Library', Dan immediately entered, went to the librarian and asked her a question, "Excuse me, I was wandering if you could tell me if you had any books on a demon named 'Mammon'?" Dan asked in the sweetest voice that if he wasn't careful, could work on him. "Mammon, Mammon, Mammon." she repeated while her hand laid on a white crystal sphere, she looked at it before looking at Dan, "The biggest book on aisle five." she said before focusing on the book she was reading, it was titled 'Dual Cultivation' and its cover had an EXTREMELY revealing picture of a woman, Dan ignored the sight that almost stirred a reaction in his nether region before heading to aisle five, there he saw a book of roughly the same size as his chest, he picked it up expecting it to be heavy but to his greatest surprise, it was as light as a feather. Dan inspected the book further and noticed the slightly glowing runes engraved on it, 'First the runes around Night before it disappeared and now runes on this book to make it lighter, I need to learn how create or carve runes' Dan thought before he sat down, 'Runes around me, what runes?' Night asked in Dan's head, "Damn it keep quiet, I am trying to read." Dan shouted out loud earning him a set of disapproving looks, 'Shh, you're in a library.' Night whispered in Dan's head, almost making the latter snap and after ten minutes of calming himself down, he opened the book.
In it was a set of different info but Dan skipped them until his eyes landed on a heading that read Mammon, following the heading wasn't the human like creature Dan had fought, the picture showed a humanoid figure with horns and four arms and under that was the info and it read, 'Mammon, the demon of greed and one of the sons of the only known Divine Supreme class demon, Satan', "Seriously, that is all they have." Dan sighed, 'Divine Supreme class demon called Satan. First I had a dream where a demon called me Satan and later, Mammon sent Night to watch me and based what it said, Mammon asked it to find me because I am a Divine Supreme class demon. I must investigate some more.' Dan thought before standing up to search the aisle, after countless hours, he came up empty.
He went back to his room, laid down on the bed and passed out. Dan woke up when a ray of sunshine hit his face, he headed to the shower, put on his clothes and headed to the Headmaster's office, he entered but saw nothing but a formation on the ground, he stood on it and it started glowing and after a few seconds, Dan saw a green prairie and a man in the middle, Dan headed to the man and stood in front of him, "You're early, Dan Jenson" the man said before he opened his eyes.