ren was happy a few hours ago because he had earned 2 million ryo with which he can eat good food and even buy necessities like research tools , kunai etc .
but now after just a small amount of time, his mood has completely worsened because mito told him that he did not need to come here in the uzumaki compound anymore . ren knew that this day would come soon as he had learnt the basics and tricks from her and the next part which is imagination and practice will be his own responsibility. still he did not think that the day would come so soon .
ren was of course sad because it was now pretty much confirmed that mito was going to pass away soon . ren didnt hear from her but can guess after looking at her tired figure and unstable chakra . after his bloodline was purified the first day ren used chakra tempring full body, he had continued to practice this method everyday.
his chakra and body became stronger too but he awakened a unique ability of sensors which are their enhanced senses . maybe because his soul was already much stronger, this ability of ren was much stronger than other beginners . he could passively sense everything in the radius of 30 meters around him and if ren used chakra sense then his range increases to 150 meters .
because of this passive ability ren was able to sense the corroding dark chakra of nine tails from mito which indicated that her control has weakened and chakra is becoming unstable . for an experienced uzumaki like mito this phenomenon could be only possible due to lack of vitality or some extreme condition. ren of course knew that the seemingly young lady was actually an old hag so the only possibility of old age was more probable.
still ren decided not think much about it as he knew that humans could live only a short life and it was fated . ren decided to focus on becoming stronger now as he knew that there were some powers which could revive the dead and ren would use them to revive mito in future .
right now inside his room , ren was meditating while circulating his chakra to temper his body . meanwhile 40 shadow clones were playing with chakra strings and creating 3 dimensional structures from earth . ren discovers that this was an easy way to train and get himself familiar with chakra control so he instructed his clones to make small imitations of statue of liberty etc with chakra strings . this way they could practice advance chakra control as the weving complicated structures was difficult and ken would benefit much more after releasing them .
ren also realised that even after cleansing his bloodline , his limits were really small . he could only advance till 7 chakra level and at most 10 body strenght with his limited body potential . of course ken had infinite chakra so it wasn't a problem but the slow increase of body strength was really a problem. at this rate even with chakra tempering full body , he will take years to reach full potential . ren didnt like the idea of such slow growth so his only choice was to evolve his bloodline and make his base potential skyrocket.
the bloodline limits like kekke genkai , Keeke mora etc were almost impossible to reach for non bloodline users . this made the bloodline users both fearsome and targets of jealousy. special affinity like scorch release , lava release or even wood release could be reached after training and combing multiple nature transformations to their peak . but still the chakra consumption was too great when compared to natural bloodline users .
and the special ones like sharingan etc were impossible to reach . ren had to inject the bloodlines in his body to evolve his own bloodline and gain new powers . ren could now sense natural energy in the atmosphere but only extremely faintly after purification of his bloodline. ren knew though that with his current potential it was impossible for him to absorb natural energy in his body and he doesn't even plan on it . ren has no need as he has got infinite chakra already..
the foreign bloodlines when injected into the body cause rejection if the body is not compatible which is normal . even implanting sharingan into foreign non uchiha body has its risks and the best example would be kakashi whose chakra drain was so immense due to sharingan .
but ren was a special case. simply because he has infinite chakra . he can overpower the stronger foreign bloodlines by supplying infinite chakra and the bloodlines will transform his bloodline after his cells reform completely in time . the sharingan gradually transformed kakshi's bloodline to make his bloodline compatible with it . that's why it was constantly active and draining his chakra .
ren could fasten the transformation process by more than 100 times by constantly supplying huge chakra to foreign cells and the transformation will naturally become faster . even the cells of hashirama which contain huge amounts of vitality will not drain his life force because ren doesn't have any worry to supply them constant huge chakra amount until the transformation or assimilation is complete. so ren doesn't need to worry about bloodlines being compatible with him or not at all . what a great cheat ...
the best thing is that ren doesn't need to absorb specifically pure bloodline . simply because he can purify his transformed bloodline again and make it purest with chakra full body tempering. so ren is planning to steal some blood of an uchiha and inject the blood into his body for the first experiment. ren doesn't consider the risks at all because he is confident that even if he doesn't awaken sharingan naturally after his bloodline transforms , nothing bad will happen to him either..