hello, everyone just in case your wondering i have not abandoned my first story and i won't, but this idea just came to me i was like 'I've gotta write this' and so here we are, i think the world needs more blue exorcist crossovers because not that many exist and blue exorcist is awesome.

this story will follow the anime not the manga (the manga's confusing compared to the anime, but the whole illuminati thing is pretty cool)

i actually got this idea reading a fanfic about the avengers Loki being harry's father and had a brainstorm whilst lamenting the small amount of blue exorcist crossovers, i was rather pleased because normally my imagination is rather uncooperative.

if you read this fanfic please review and tell me what you think, any criticism is welcome.

:)

Prologue

Satan was furious and all the other demons could feel his unquenchable anger, the reason for his anger was simple, his youngest (full demon son) Amaimon had actually attempted to kill Rin instead of pretending like Samael had instructed, not only that but he would have gotten himself killed had Samael not intervened. He was so RECKLESS and IDIOTIC, Amaimon was pathetically childish and really needed to grow up and act like the Earth King, but more to the point how dare he TRY TO KILL RIN? Rin is one of the last things to remind him of Yuri and AMAIMON TRIED TO KILL HIM! Satan was absolutely furious, and the source of this fury was trembling before him.

"I HAVE HAD ENOUGH!" Satan growled as his son shook in fear "we all try and try but you just don't know how to follow orders, you can't follow simple instructions and your anger always gets the better of you"

"Please have mercy father" Amaimon managed to gasp out, begging on his hands and knees.

"No, no, no, Amaimon its time you learned your lesson." The god of Demons said condescendingly, causing Amaimon to quiver even more.

Satan started calling on his power as his Son shook in front of him, "you will banished to Assiah, with your powers sealed, maybe there you can learn your place"

He began looking for a suitable vessel for his son's demon soul, he'd never send him to earth in the one he already had, that would defeat the objective… 'This one should do just fine' he thought as a massive smirk spread across his face.

James potter, a baby who would not make even three days old, perfect, and with his powers sealed his vessels appearance will not change, what better way to make someone more mature, than make them grow up again. The fact he was a magic user made it even better.

He turned back to his son and smiled widely, showing off his fangs before getting to work.

The next thing Amaimon knew he was waking up, it was warm, 'wait I was kneeling before my father... where am i?...'

he opened his eyes, he was looking up at a woman she had chocolate brown hair and warm brown eyes, he was not happy, how dare this human hold him? he tried to make his displeasure known but all that came out were gurgles... 'what the hell?'

he only just noticed everything seemed bigger than he remembered... 'NO, NO, NO, he wouldn't...'

he tried to move, all he could do was flail a bit, he seemed so uncoordinated... 'HELL NO! I'M A CHILD! I FREAKING CHILD!'

he wanted to roar with anger but all he could do was cry, and he could feel his powers just out of reach and untouchable...

he could just imagine his brothers laughing about his situation, he could practically hear them...

'i'm gonna be stuck like this until this vessel dies naturally aren't i?'

'DAMMIT!'

It had been 21 years (and a bit) since that day, it had taken a while but he had gotten used to his predicament and worked to make the best of it, he'd made friends (unbelievably), had wife and even a son (even more unbelievable) but a war had started and due to a prophecy (a prophecy of all things) a insane man seeking immortality wanted to kill his son. He had never wished to have his powers back more than he did now, he would crush this voldemort, he would rip his very soul into thousands of pieces, and drag the remainder into Gehenna to meet his brothers... he was broken out of his violent musings when Lily walked in with Harry. It had been Lily's eyes that first drew him to her, her practically luminescent green eyes, that reminded him of the earth and the perfection of nature. He was glad Harry had her eyes; although with a hint of cyan around the pupil (he had been worried that Harry would look like his true self, luckily he looked like his current vessel, however he figured that would change when harry awakened his powers, he dreaded that day, because that would be the day where he came clean about his true heritage and he didn't know how they'd all take it) looking at Lily and Harry he really hoped when they found out who he really was that they would be open minded.

'How did this happen?' he thought as he looked into the red eyes of voldemort, 'why did peter betray us?'

He watched as the green light of Avada Kedavra sped towards him, and struck his chest, 'Damn this mortal body!'

He felt his heart stop and his body fell forward, the last thing he saw before he was thrown from Assiah was voldemort advancing towards Lily and Harry.

'NNOOOOOOOOO!'

"Ah, it seems the estranged son returns" Satan mused to his second eldest son, Samael (now known as Mephisto), "I had expected his mortal life to be a little bit longer than this"

Suddenly the ground shook beneath their feet, as a pained howl split the air, filled with anger, hatred and sorrow.

Just outside palace, back in his old vessel, Amaimon was on his knee's screaming his pain to the world as thick tears ran down his face.

so what do you think?