Board Thread:Naruto Discussions/@comment-45851667-20200520192705/@comment-32685487-20200523204522

Merging it into the crow means nothing as the crow does not have the special brain chakra like an Uchiha would, its just an easier way of transplanting the eye into the crow and making it fit, because you know.. crows have smaller eyes than humans so he can't just take a human eye and put it into the crow's eye socket. So therefor it would be no different that Kakashi having it as he is also not an Uchiha. The crow would most definitely need 10 years to re-charge. Shisui himself though?? not really. He is the eyes original owner and as said before he used Koto enough to know how it works and all after age 6 but before age 13 and thats a less than 10 year gap, also the Hashirama cells in a crow?? That could easily work as Danzo only had a problem controlling the cells because he had an entire Hashirama face on his shoulder. If a bit of Hashi DNA was injected into the crow and it took the DNA without rejection then it would work. Hashi cells would have that affect on the crows usage no doubt.