A Demon King Through The Worlds

Jokes aside, if we consider that a kekkijutsu is a mark formed after gathering traces of the blood and souls of those that the demon in question devoured, what Lucian did was dismantle and then reassemble the mark that Gyokko possessed.

This was the principle to transform Gyokko's kekkijutsu into another kekkijutsu.

Analyzing these issues, Lucian soon realized that this opens up a large scope for development.

Many possibilities, be they transfer, copy, modification and fusion of kekkijutsus.

'It can be inferred that the reason demons don't have more than one kekkijutsu is that only the first one appears spontaneously, any others would need active intervention.' Lucian concluded.

As for why Muzan doesn't know any of this? Simple, his "permanence" and his arrogance stopped him, and of course, the fact of his zero concern for his subordinates.

'Now back to the important thing' Lucian opened his eyes and turned to Nakime: "Take me to Mount Sagiri"

He would look for Tanjiro's family. Even though the name of the mountain where they lived or the village near the mountain was not said, it can be assumed that it is not too far from Mount Sagiri, considering that Tanjiro arrived in a few days and carrying Nezuko on his back.

Considering their movement speed Lucian would soon find them.

And Nakime as silent as ever, she just nodded before touching her biwa, then a door appeared and opened.

"Thank you" Lucian thanked him before going through the door, which he closed and then disappeared.

He then observed the surroundings, lush trees and dense forest on the ground, only faint beams of moonlight passing through the leaves could provide a light in these dark forests.

He then took a deep breath, even though he didn't need to, enjoying the light breeze and the freshness of the air.

And then to facilitate the search he located the temple demon (nickname given to the first demon that tanjiro encountered).

And it didn't take long, as the temple demon had a hut on the outskirts of Mount Sagiri as his territory.

Using this demon as a reference Lucian found the path that Tanjiro had taken towards Mount Sagiri, as for the poor demon, he was just killed before he could react.

Lucian then whistled a little song as he walked along the land path, or rather ran, considering the speed at which he was moving, after all, he should hurry before the sun rises.

Upon finally finding a village and knowing that there was only an hour left until sunrise, Lucian stopped and found a cave nearby.

He stopped and then began to release a large number of small familiars, sending them scattering and hiding in the ground as he expanded the search range.

Then, upon noticing the sun's rays dispelling the darkness and warming the dense forest, Lucian entered the gloomy cave even further.

After all, even if the familiars could move around on the ground, it was too big to move underground, the effort in digging the hole would be completely wasted.

So he would just sit in the cave and develop his skills a little more while waiting for the sun to set.

-------------------Time skip ------------------

Lucian stood up and stretched, before leaving the cave.

'Full moon… sign of luck' He smiled as he looked at the bright moon that adorned the night sky.

'Now go to the next village' he thought, soon returning to his search.

Neither he nor any of his family members heard the name Tanjiro or anyone from the Kamado family within a 10 kilometer radius, so he concluded that they didn't live around here.

Therefore he ran directly to the nearest village, before finding a place to escape the sun.

As for why not search at night, simple, unlike modern times most people at that time sleep not long after sunset.

After all, the vast majority of villages didn't even have electricity, and only a few large cities had an active nightlife.

This is something that would end up greatly reducing the efficiency of the search.

During the night, everyone is sleeping.

And during the day he can only expand his perception by trying to locate the Kamado family while hiding from the sun.

'I will have to rely on family members'

Because only they would be able to move during the day because they were crawling underground.

And this boring process fortunately continued for just a few days.

"So that's where they live? Thank you for your services." Said Lucian to the cicada that was in his left hand, before it dissolved into blood and entered his body.

Finally having the information he desired, Lucian soon hurried over.

Anxiety written all over his face.

After all, the blue spider lily was the solution to all his problems.

And within a few hours he reached his destination.

At this moment the sun was already rising, dyeing the previously dark sky with a golden glow.

But he was already prepared for this, and quickly covered himself with the large umbrella he had prepared.

'Someone unknown approaching them in the mountains at night could raise a lot of suspicion...' Lucian thought as he walked.

"Hello, would you be part of the Kamado family?" Lucian asked a young woman he found picking flowers.

The young woman turned to look at Lucian, her long black hair tied into a low bun, her beautiful face possessing gentle features, and her bright eyes are dark pink. This is Nezuko Kamado.

"Yes, I am Nezuko Kamado, do you want to buy coal or do you have other business to attend to?" Nezuko introduced herself, before asking curiously, after all, it's not often that someone appears, especially wearing such a large umbrella.

"Yes, I want to ask your mother something. In fact, it would be better if the whole family listened." Lucian responded with a smile, appreciating the beauty of the young girl in front of him, and happy considering how close he is to the blue spider lily.

"Follow me." Nezuko spoke, guiding him through the trees to the Kamado house, not having any suspicion that this beautiful man was actually the king of the demons that devour men, or women, since they provide more nutrition.

"Thanks." Lucian thanked her, before following her. Her smile almost goes from ear to ear.

If Nezuko looked back at this moment, she would certainly be frightened by Lucian's features full of frantic joy.