It was early in the morning birds chirping kids waking for school and those who are still asleep at the uchiha clan head home there was a knock at the door this of course was hiruzen the third hokage he had got the information about the child within the home
-flash back-
In the hokage estate a doctor was at the seat of the hokage
Hiruzen: yes what can I help you with.
Doctor:I've come to report that the child of uchiha fugaku and Mikoto was born not to long ago and the child was brought for a check up,and when I saw the child he was pale as if he had no blood and had a tail.
Hiruzen: a tail!?
Doctor: that's not all the child also had eyes on his hand and had three eyes on his face,I've had the hyuga clan head come in to check the child for anything I missed and he said that the child had chakra levels could rival a tailed beast,the child also was able to use some sort of force from the eyes on his hands to blow hiashi away. This shocked hiruzen, and before he could say anything hiashi walked into the room bringing hiruzen out of shock.
Hiruzen: w-what can I help you with hiashi.
Hiashi: hokage-sama I've come to report about fugaku's child.
Hiruzen: yes I've just been told about him.
Hiashi:no it's not about what ever the doctor has told you, I think the boy is a jinchuriki, when I check the boy's chakra I saw a separate source of chakra within him and the head of a fox.
Hiruzen: thank you both for this information, don't let word of the boy being a jinchuriki get out, dismissed 'how is the boy a jinchuriki?'. With that the two left his office.
-flash back end-
Hiruzen waited a few minutes until the door opened for him to see a groggy fugaku.
Fugaku: to what do I owe this visit hokage-sama.
Hiruzen: I've come to see your child .
Fugaku: 'of course that doctor told him!',come in. Hiruzen and fugaku walk in the house.
Fugaku: please wait a moment while I get him. Seconds later fugaku comes out with the child and to hiruzen's surprise the child is as the two last night had explained hiruzen also felt another source of chakra in the child it was the same level as the child's chakra which was growing because izuraki wanted it to be stronger then even the ten tails.
Hiruzen:I've come to see the child because it was said he could be a jinchuriki so I've come to seal it.
Fugaku:hokage-sama there is no way my son is a jinchuriki because we have not left the village since my two sons were born,I took this one straight to the hospital that night.
Hiruzen: well if the boy is a jinchuriki then this seal will work. Unknown to two conversing izuraki was in his mind scape creating another tailed best this on was taking the shape of a dragon that had a purple glow on the underbelly and to the left of the two was a small sleeping white fox with golden outlines on his tails, just waking up.
???:good morning father,Ooo I'm getting a brother?.
Izuraki: good morning soro,yes you are I need a bit of chakra for help. How was that going to work you ask?, well ever since soro had gained Conscience he was able to converge izuraki's chakra into his own and gather chakra. As izuraki was getting help from soro unknown to him Soro's chakra was leaking out of his body.
Hiruzen:well that proves this seal is going to work look at the white chakra leaking from the boy. Fugaku looks down and sees white chakra taking form of a fox which shocks him because he had no seals a beast in him nor had anyone been near him to do so.
Hiruzen summons a ceremonial throne and preforms the eight trigram seal on izuraki.
Inside izuraki's mind you could see two beings locked behind bars one was a dragon and the other was a fox
Izuraki:Damn it they must have felt your chakra, don't worry guys I'll unlock this seal.
On the outside izuraki started crying because his two 'sons' were just sealed and the two around him thought he was hungry he was but that was not the reason for him being upset.
Hiruzen:well I will be on my way take care fugaku. As hiruzen walked away fugaku closed the door and took izuraki to be fed.