Both time-traveled characters ended up as villainous henchmen.

"I always felt that the Eight Extraordinary Techniques relied too much on the laws of nature in one's own world, and they might completely lose their effectiveness in other worlds."

One person, He Nian, added an explanation to the pirate, He Nian.

Some of the Eight Extraordinary Skills, such as the Great Luo Insight, are so powerful that they seem out of place in the low-magic world of a one-man world, yet they do exist in reality.

Therefore, after experiencing the baptism of different world laws and power systems, He Nian made the above speculation.

On the contrary, the most basic life skills, mental strength and physical strength, are applicable in most parts of the world.

"Alright then." Pirate He Nian only felt a little regretful for a moment, unlike Naruto He Nian who reacted with great intensity.

After all, among them, the one facing the greatest survival crisis right now seems to be Hokage He Nian, who is also the youngest.

The others have all entered a stable phase. Even the newcomer Gui Nian, who just entered the Black Mist Space, is not in a bad situation, especially since he has shared power with others.

Once you get back, as long as you avoid the sun, surviving shouldn't be a problem.

Needless to say, Pikachu's side is even worse.

After listening to He Nian's speech, Hokage He Nian no longer placed his hopes on He Nian.

It would be better for me to go back and cultivate on my own.

"Alright, that's about it for this meeting. Everyone, go back and practice the power system of your respective worlds. Don't end up like someone who's truly doing nothing."

Hokage He Nian clapped his hands to draw everyone's attention and said, "I hope that when we meet again, everyone will have made great progress."

After saying that, he was the first to log off and go back to experience the power he had gained.

Afterwards, He Nian from One Piece and He Nian from Demon Slayer also logged off one after another, leaving only He Nian and Pikachu Nian, who were still happily chatting in the Black Mist Space.

……

The world of Demon Slayer.

Inside a dimly lit cave.

Morikawa Nianyi, or rather He Nian, slowly opened his eyes. Looking at the dark and oppressive cave environment around him, he felt an unprecedented sense of ease and light.

He could clearly sense that his physical abilities had greatly improved after returning from the black mist space.

Moreover, there were constant strange movements emanating from the blood, as if it were undergoing a transformation.

"According to others, this change should be attributed to the transformation of shared power after the world rules have changed."

Judging from the Demon Slayer universe, it should be Blood Demon Art.

Having seen the examples of He Nian from other worlds, he quickly guessed the changes that were happening to him.

"What kind of blood demon magic will awaken?"

He Nian couldn't help but feel excited. He remembered that in the original Demon Slayer manga, the abilities of Blood Demon Arts were incredibly diverse, including advanced abilities such as spatial manipulation.

More importantly, Blood Demon Art comes from the blood of demons; in other words, it originates from bloodline inheritance. Unlike the mystical Eight Extraordinary Techniques, Blood Demon Art seems to be more practical and versatile.

Before long, the changes in He Nian's blood ended, and in an instant, a realization dawned on him: what type of Blood Demon Art had he awakened?

Crackling sound~

With a flash of silver light, streaks of silver-white lightning appeared on He Nian's body, winding and activating his powerful physical strength.

"Lightning Blood Demon Art? And this is Lightning Release Chakra Mode?"

He Nian was startled, and the image of Pika Nian without blush quickly flashed into her mind.

"Although I didn't win the grand prize, this lightning manipulation ability has great potential."

He Nian quickly adjusted her mindset and didn't dwell on it too much.

Lightning-based abilities have many advantages, but if we're talking about disadvantages, it's that after the lightning was released from within her body, He Nian's clothes were completely torn to shreds.

"This problem needs to be resolved as soon as possible..."

Otherwise, he might start running around naked once the fighting begins. "Until we find suitable clothing materials, let's control the range of the lightning strikes."

Aside from the most obvious lightning-based Blood Demon Art, He Nian also successfully sensed the immense power hidden within his body that was not recognized by the world's rules, as mentioned by the pirate He Nian.

"The world's recognition..."

He Nian sat cross-legged in the darkness, slowly recalling the power system in Demon Slayer.

Aside from the man-eating immortal demons, the most famous aspect of Demon Slayer is its breathing techniques.

Breathing techniques are an important means for humans in the Demon Slayer world to fight against man-eating demons, and also a powerful secret technique to enhance their strength.

However, after witnessing the power systems of other worlds, He Nian now has a somewhat low opinion of the breathing techniques in Demon Slayer.

"It seems that breathing techniques also have a place in the Qi cultivation system of a one-person world."

When recalling memories passed down from other worlds, He Nian also successfully gained inspiration from the memories of another He Nian.

The breathing techniques in One Person's World are not an independent cultivation system, but a supplement that is widely used in various cultivation methods and martial arts.

For example, the breathing techniques used by a person practicing Qigong are a type of breathing method.

"Since there are breathing techniques available, let's give them a try. Anyway, with my current physical body, even if some minor problems arise, I can heal myself."

Without further hesitation, He Nian found the common ground between the different worlds and immediately began to try out the breathing and exhalation method that He Nian used when he was alone.

A moment later, he suddenly felt unwell, and some of his internal organs were damaged.

He Nian did not force himself to continue, but stopped to repair his body. Only after his body recovered did he change his breathing method and continue trying.

After sharing power with the Black Mist Space, he is now full of energy and doesn't care about the consumption of self-healing. Moreover, the cannibalistic desire that he used to have to desperately suppress has been greatly reduced.

And so a day and a night passed.

After nearly three hundred failures, He Nian finally used his own flesh and blood to devise a simple breathing method that suited him.

This breathing technique differs from the breathing techniques in the Demon Slayer world, incorporating many unique characteristics of the Ichijin world. While it lacks the instantaneous boost to physical abilities, it possesses the benefits of health preservation and slow body tempering.

Simply put, the first type of breathing technique has a short-term effect; it is powerful but places a huge burden on the user's body. The other cannot be directly applied to combat, but it can slowly transform a person's life essence.

One focuses on fighting and killing, while the other focuses on training and nurturing.

Furthermore, during the process of breathing, He Nian also sensed a kind of ethereal and illusory power in the world.

He knew that this thing, which resembled natural energy, was most likely the result of Hokage He Nian's Sage Body and One Person Qi Refining Technique.

"Then, next, I can try to make the world 'believe' in me more." He Nian thought of the incense and shrine that the pirate He Nian had mentioned. It seemed that in this era of evil spirits, it was very suitable for proselytizing.

"Thunder magic exorcises evil, it's the will of Heaven. This is the righteous path, after all!"

Just as He Nian was planning to portray himself as a demon-slaying thunder immortal spreading his teachings in Demon Slayer, he made a surprising discovery upon returning to the Naruto world.

Naruto World

Izumi Nen held a chakra test strip between two fingers, and under his control, the strip quickly became wrinkled, indicating that the Lightning Release chakra had been successfully awakened.

However, what concerned him even more was another chakra within his body with completely different attributes.

Special Yin Release chakra from He Nian of Demon Slayer.

A Yin Release chakra with powerful self-healing abilities!