Before anything, Ketsueki started to analyze his body first.
'This body is incredibly weak at the moment, I need to find food for myself' He quickly concluded, he then analyzed his dojutsu after.
'The ketsuryugan huh, I'm quite satisfied that I have it. It has the potential to be the strongest and even in the anime, it didn't show it's full potential. No maybe it can even be evolved'
The sudden realization upon his discovery of his ketsuryugan shocked Ketsueki even more, he imagined the endless possibilities that he can do with his eye.
'Blood manipulation and genjutsu prowess that can even surpass the Uchiha's sharingan' He then thought of an idea.
He then sat down on the ground as he meditated. He felt every nerves in his body as he felt some kind of foreign energy flowing within him.
'So this is chakra' Ketsueki quickly concluded
He then tried to focus on his flow of chakra. He redirected the flow to his eyes and when he opened them he felt a huge surge of power emanate from within.
Back in the village, Ketsueki only managed to awaken his ketsuryugan due to an emotional outburst.
But opening it manually, it was such a natural feeling for Ketsueki.
To continue, Ketsueki then closed his eyes once again as he tried to feel every blood cell in his body.
He felt the cells coming to every organ in his body.
For him, it would be completely risky to do manipulate the blood that was within him because it's his first time.
He then had a thought in his head
'By increasing the cell's capabilities in my brain my comprehension and memory will improve by a huge margin, back then in anime's I always see characters with the ability to manipulate blood, that means they have the ability to manipulate their cells, but they never thought of using their powers this way, this is basically a cheat.'
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'Not only that, with that same method I could also use it to strengthen my organs.'
'This means my combat power will also rise exponentially because this will give me faster, no maybe the fastest reaction time possible and better protection and function of my organs'
After feeling his new body Ketsueki closed his ketsuryugan.
'I should train my body first, then chakra control, but first I should mess around with my blood manipulation even more'
He then walked back to the raided village.
"Let's see if this actually works"
Ketsueki said after walking to a nearby corpse. He then released his ketsuryugan once again. He analyzed the dead body and controlled the blood within it. He tried to manipulate the dead blood cells but unexpectedly it worked.
'I have the ability to even revitalize dead blood cells'
The prospect of this intrigued him even more. He then manipulated the body to rise up but as he was half-way through it the body once again dropped down
'I still lack the control'
Ketsueki regrettably thought. He then found another idea, his lips suddenly curled upwards. He looked like a kid who has gotten a new toy.
Ketsueki then put his hand forward to the body and tried to extract the blood from the dead body.
Ketsueki frowned at this but he didn't lose hope. Ketsueki then directly put his hand on the body and tried to extract the blood from it.
The blood started to come to him and what resulted was the body he was touching became a dried up corpse. The blood that came to him also didn't merge with his own, it was as if it only sucked out the blood out of the dead body.
He also concluded that he was able to manipulate the blood itself, not the iron only, which was a cheat for him and different from what was stated from the canon.
'Blood absorption is not available yet' Ketsueki was saddened by this fact but it was time for him to move on to the other ability of his ketsuryugan.
Which is iron manipulation, now this is something that is often overlooked, he is able to control both blood and iron.
'Iron manipulation, this will make most weapons from this world virtually useless to me as I can manipulate it making it harmless to me' Ketsueki then recalled the Third Kazekage's "Iron Sand", him having the ability to manipulate iron directly means he doesn't need to have the nature needed for the Third Kazekage's kekkei genkai.
'The ketsuryugan's possibilites are endless'