xine_reader
ok wait a min so even if hes mangekyo is broken so he can basically use himself as a guinea pig with no repercussion I still feel that he wouldnt have enough medical knowledge to pull what he did off, maximum is to understand how to preserve the arm and all but aint now way he basically merged hashiramas cells in 7 days with no prior training beside basic medic training. research in biology and regular medic training are diferent.
I don't really see the point of the MC wanting a kenkei genkei, of course it's good but he already has the sharingan. (it's a bit like the kid who wants can't choose between several games and takes both) So hopefully it will only be temporary or it will be justified Just with his body modification, the MC already cheats too much, he naturally has the 5 elemental nature of chakra, yin and yang he has Yin and Katon thanks to his pure uchiha body the Raiton and the Futon by its original body. the Doton, the Suiton and the Yang via the senju cells of the hashirama. You have to understand that having so much nature in a natural way is impossible. Those who mastered so many had to train like crazy to master them like Hiruzen and Kakashi, in both cases training is necessary but posseded them in a natural way shortened the training time enormously. What's great at least about cell modification is that he fused that with his stem cells. it's as if it were his own cells, unlike Orochimaru, Tenzo and Danzo... who only do transplants.