Nanaya Kiryu was also practicing the use of the 'Mystic Eyes of Death Perception'.
After all, this would be his means of livelihood in the future.
To explain this to his clan members, Nanaya Kiryu referred to it as training the 'Pure Eyes'.
The 'Pure Eyes' were hereditary in the clan—every member of the Nanaya clan possessed them, but their degree of mastery varied.
As a member of the Nanaya clan, Nanaya Kiryu naturally also awakened the 'Pure Eyes'.
The so-called 'Pure Eyes' allowed one to see things that should not exist, or rather things that should not be seen... Seeing what ordinary people could not. If 'Mystic Eyes' were considered a genetic/physical hereditary modification (passing down physical traits from parents), then 'Pure Eyes' were spiritual hereditary traits (passing down the spiritual essence and training results from parents). In other words, the causes and effects of the parents were inherited by the children.
'Pure Eyes' could only be inherited by humans with high spirituality.
For Kiryu, this was a perfect cover for his 'Mystic Eyes of Death Perception'.
Interestingly, he did not experience any side effects like Tohno Shiki or Ryougi Shiki, such as eye pain or inability to control. He could use the eyes freely without any side effects, activating and deactivating them at will.
By the way, he had no parents in this world.
There was no deep-seated hatred... His parents simply met with an accident in this life.
His father fell off a cliff and died, and his mother passed away from grief after giving birth to him.
So, Kiryu was raised by other members of the clan.
Perhaps it was true, as the clan members said, that he was exceptionally gifted. Kiryu found himself learning the Nanaya martial arts faster than his peers, and once he learned something, he could immediately master it without any sense of unfamiliarity.
It was as if he had been immersed in this field for years.
To prevent him from being unable to handle blood in the future, the clan brought small animals from the mountains for Kiryu to practice on. Kiryu did not refuse, knowing that strength was the most important thing in this world. He also participated in battles against invaders in the Nanaya Village, staining his hands with the blood of intruders.
Without experiencing bloodshed, the Nanaya assassination arts could not be considered as mastered.
He went from initial vomiting and discomfort to calmness.
Now, he could kill without batting an eye...
However, one thing that puzzled Kiryu was that the voice that had granted him the 'Mystic Eyes of Death Perception' never appeared again. If it weren't for the fact that the 'Mystic Eyes' were indeed his, he would have thought he had imagined it.
He considered many possibilities.
Perhaps it was a golden finger, a 'System' granted as a boon during transmigration...
But no matter how he called for it(the System) over the years, there was no response, and he eventually gave up. It seemed his transmigration was not a system-based one. So, what was that voice? And was the part about dying "9,999,999+" times a mistake?
He kept these thoughts to himself.
Before he knew it, Kiryu turned fifteen and had mastered all the Nanaya assassination techniques.
He had great confidence in his skills.
The combination of the Nanaya assassination arts and the 'Mystic Eyes of Death Perception' made him invincible!
In all these years, Kiryu had never ventured down the mountain.
Though he had gotten used to life in the mountains, having lived in a big city in his previous life, he still missed modern society a bit. Moreover, it seemed wasteful to have transmigrated yet remain hidden in the mountains forever. Would it really be safe to keep hiding?
As he pondered whether to explore the Tsukihime world, the clan's elders approached him.
"Kiryu, it's time you received this..." A venerable elder handed Kiryu a dagger.
"This is the Nanaya Exorcism Dagger?" Kiryu inquired.
"Indeed." The elder nodded with a smile.
Taking the dagger and touching the engraved 'Nanaya' characters on the hilt, Kiryu's expression was complex.
The Nanaya Exorcism Dagger was a hereditary treasure of the Nanaya clan, specifically meant for non-human entities.
It also symbolized a master of the Nanaya assassination arts!
"Now that you've grown up and mastered all the Nanaya assassination techniques, it's time for you to venture out and gain experience."