Izuku was currently un the floor half deadd in the middle of a deafeted shigaraki and AFO,
AFO had revealed Izuku to be his son
AFO however couldn't bare that he couldn't have OFA wait no that wasn't his dream he wanted to be whole again he wanted the quirk to be whole again, however, he knew that there was no way that he could take the quirk so he did the only thing that his destroyed mind could think of which was to steals shigakais quirks and give AFO to Izuku midoriya aka his son and that was exactly what happened AFO died felling whole again however he knew that Izuku and shigaraki would eventually die and so they did, however, what he haddent realise is one quirk that he had stole thousands of years ago before stealing his immortality quirk he stole a reincarnation quirk however he didn't know how to use it, and now it was taking effect.
IZuku however felt like he was born again it felt new he had no way to explain it however he then heard a voice in his head
Nana: Izuku we have been able to put a lock on AFO so it doesn't take control of your body however we don't know what is happening
However there question was short livined when they saw a women a man and and 2 old man According to NAna they were probably 40 years old however one of the mans was looking at him with wide eyes
Yoriichi pov
So he is my grandson wait is that a demon slayer mark but it isn't in the surface of his body (he can see through the body due to the transparent world ability look it up) and I have never seen a demon slayer mark so extended it is so big it makes it to his feet!
Narrator pov
The young Izuku saw the man and was kind of weirded out since he could see him however if he wanted to he could see his insides his veins everything
Izuku: *thoughts* Nana is this a quirk
Nana: I don't think so it looks like a lot of AFOs passive quirks like immortality are still in effect but this and that weird mark that is inside you arent a quirk it is pretty interesting
From here on Izuku grew up his parents died however his grandfather and grand uncle took care of him like his was their child they should them their respective styles and were surprises to find out that phisicly he was stronger than them they were surprized that he kicked their ass in hand to hand combat they asked how did he knew when to attack and he responded very shy and timidly aloutgh they were his "fathers"
IZuku: before you attack your lungs they heave, you just have to look closely at the disposition of your bones, the contractions of muscles and the flow of blood I am sure grandpa sees it but he doesn't know how to change your body's rithem as I do.
Yoriichi: wait so you can see though us like I do
Izuku: I can see your face however if I want to I can also see your face and brain and blood flow veins everything
kokushibu: so he has both things he will definitely surpass us we will have an heir to the sun and moon breaths
From here on Izuku learned how to use total concentration breath although it wants comparable to even 5% of OFA however he had to admit that his strength was enhanced due to the mark and that his ability which his granduncle said was the transparent world helped him develop new fighting styles using both arms en legs however the time came were they gave Izuku a Niichirin blade and well it turned black however they were shocked when Izuku turned it Red and then black
Izuku: I feel like a wizard *while changing the colors*
This made them sweatdrop however they were happy after all they though that Yoriichi was the only person to make his Nichirin into crimson red and due to this cuts with the crimson red blade would let him hamper the enhanced regeneration of Demons, even Muzan's nigh-absolute regeneration, leaving permanent damage burned into his cells that haven't healed for hundreds of years
