No, where does this portal come from?

The most important thing is that it saves time to build!

It's just a short sword with relatively complicated craftsmanship, but it is much easier to fight with than the complete set of armor of the other three.

Staring at the dagger in his hand, Lin Yan slowly put it away.

"I wonder how Kuronuma's potion research is progressing..."

"After empowering the World Tree System, I only have 2,800 points left. That's not enough to empower the Haunted Devil..."

'Besides, with my current physical condition, I should have no problem with the first form of the demon, but if he starts to evolve... I think it will be quite difficult.

Only by waiting for the potion to be developed and seizing it, then killing Muzan and completely destroying the Demon Slayer storyline, can one achieve the goal of empowering the demon to be possessed while making the body fully capable of bearing the side effects of the demon.

Thinking of this, Lin Yan felt a little worried.

Could Kuronuma please help... speed up the research? My time is precious, too!

Walking out of the workshop, Lin Yan looked towards the courtyard of Hei Swamp not far away.

In recent months, Hei Zan has rarely appeared in front of Lin Yan.

Jing Pingcao said that Hei Numa would go out early before dawn every day and would not come back until the evening.

Every time he came back to Black Swamp, he was covered in dust and dirt, carrying a large basket of herbs and a jar of something that looked like blood on his back.

"So much time has passed... I wonder how his research progress is..."

"It seems I have to find a chance to ask him today."

After simply washing off the sweat on his body with clean water and putting on the clean clothes folded at the door, Lin Yan walked to Heizhuan's door.

knock knock --

"Black Swamp—" Lin Yan shouted in a long voice.

Seeing that no one responded, he shouted a few more times.

"There's really no one..." Lin Yan turned his eyes slightly and glanced at the door: "If there's no one, I can go in."

Chapter 53 The last piece of the puzzle will be completed today!

His eyes looked at the closed door, and his hand slowly moved towards the door handle.

Just as his palm was about to touch the door, his fingertips suddenly hovered three inches above the copper door handle.

Lin Yan narrowed his eyes and looked at the grayish-blue hair between the cracks in the door.

The sunlight slanted in from the eaves, turning the hair into translucent silver threads, which were now trembling slightly in the wind.

"That's quite cautious." Pulling back his hand that was about to touch the door, Lin Yan looked at the shoe prints he had left on the floor at the door.

He took out a pack of wet wipes from his pocket and wiped off the shoe prints. After noting the position of the hair, golden light attached to the soles of the shoes and fingertips.

After glancing around and seeing that there was no one around, Lin Yan stepped into the room.

The windows in the room were covered with cloth, which made the room very dark even during the day.

The room was filled with a strong herbal smell, and Lin Yan couldn't stand it for a moment and covered his mouth and nose.

On the long table not far away, there were various bottles and jars.

In the middle of the long table, a bowl of liquid that looked like mud was quietly placed on the table.

"What is this?" Lin Yan frowned slightly: "Could this be the so-called 'medicine'?"

“Isn’t this sesame paste?”

To avoid fingerprints, the gold light completely covers the palm.

Only then did Lin Yan reach out and pick up the medicine in front of him.

The moment he touched the potion, a few lines of text flashed on the empowerment panel.

[After accessing the 'Enhanced Potion - Incomplete Version', you can spend different power-up points to perform original power-up.]

[Enhanced Potion·Incomplete Version: The potion has defects in strength, lifespan, and characteristics, including thirst for blood and fear of sunlight.

Spending 1,500 empowerment points on original empowerment can make up for the deficiencies in the potion.

Spend 800 Arcane Points to perform Chaos Arcane. 】

"It will take 1,500 points to fill the potion's defects?" He moved his gaze from the empowerment panel to the potion in front of him, and finally put it back intact.

Anyway, we have been waiting for such a long time, and two days won’t make a difference. Spending 1,500 points to fill the potion defects is really a bit of a luxury.

"It's better to wait."

Listening attentively to the sounds in the courtyard, Lin Yan found that there was no sound around, so he quickly put his hair back in place and withdrew.

And seeing the matter of Black Swamp...

Since we already know that there are still many aspects of the potion that are not yet complete, there is no need to ask Hei Nuo in person.

Lin Yan retracted the golden light from his fingertips and soles of his feet and quickly walked out of the courtyard.

In the days that followed, Lin Yan would take time every day to quietly check the progress of the potion.

As for how to check?

Of course, I touch it every day!

Today, I still need 1,500 power points to complete it. Tomorrow, I only need 1,200 points. The day after tomorrow, I only need 1,150 points...

Without Hei Nuo's knowledge, Lin Yan monitored Hei Nuo's research progress every day to see if he was slacking off.

Time passes day by day.

Lin Yan's life is very fulfilling every day.

In the morning, I treat illnesses and practice exercises; at noon, I make iron and carve puppets; in the afternoon, I check the potions; in the evening, I brag to my friends in the group.

At the end of the day, Lin Yan even felt that time was not enough.

until one day……

Lin Yan discovered that the progress of the potion had suddenly stopped recently...

The empowerment points that would originally decrease by dozens every two or three days were now fixed at around 500.

This situation lasted for more than a month.

Every time Lin Yan went to see, the medicine was still the same medicine, and the sesame paste was still the same bowl of sesame paste.

This situation reminded him of the night when Muzan turned into a demon in the plot.

"Could it be that this state continued until Muzan was about to die? Kurozan had no choice but to let Muzan take an incomplete potion?" Lin Yan, lying on the bed, no longer had the desire to chat with his group friends.

After thinking for a long time, Lin Yan turned over and said, "Forget it... I'll find time tomorrow to ask Hei Nuo if he can help me with anything."

"go to bed!"

Nothing happened all night.

Tread-tap-

Kuronuma, carrying a medicine box on his back, walked out of the main gate of the birth house.

As soon as he went out, Hei Zha bumped into Lin Yan by "extreme coincidence".

"Wow! It's so early, Hei Nuo!" Lin Yan widened his eyes and pretended to be surprised.

"You're up early too." Heinuma bowed slightly to Lin Yan.

Lin Yan's current status in the Ubuyashiki family is almost equal to that of the head of the family. Although this status is only temporary, a temporary status is still a status.

Even a "marginal character" like Hei Nuo still has to bow respectfully when seeing Lin Yan.

In the morning mist, the two chatted by the door for a while before Lin Yan got to the point.

Lin Yan looked at Hei Numa with a serious face: "Hei Numa, what do you think of Master Muzan's health now?"

Faced with Lin Yan's question, Hei Zan was a little confused.

After a moment's silence, he slowly replied, "...I feel that Master Muzan's health is improving."

"Really... But what if I say that this development is only temporary?" Lin Yan stared at Hei Swamp.

Hei Nuo's breathing hitched when he heard that.

"What you mean is..." The thin Heinuma hesitated. He vaguely guessed what Lin Yan meant.

"That's right, I can no longer suppress Muzan's condition." He said in a serious tone.

Hearing this, Hei Nuo's expression suddenly changed: "But my potion is not finished yet..."

"How much more is left?"

"...Five percent!" Heinuma gritted his teeth and said.

"Where is the difference of this 5%? Didn't you say that the plan has been completed?" Lin Yan asked.

Hearing Lin Yan's questions about the potion, Hei Nuo pursed his lips. After thinking about which was more important, the potion formula or Muzan, he finally told the reason for the last 5% difference.

"A lot of blue Bana, I need a lot of blue Bana! Only then can my potion be completely finished!"

"But this flower only blooms when the sun is at its strongest, and its medicinal properties are only active during the day!"

"But...but even if these days are the sunniest days of the year, how can I collect so many blue red spider lilies in such a short time by myself!" Kuronuma said, grabbing his hair with both hands and pulling hard, with a distorted expression.

At this moment, he was like a student who collapsed in the examination room.

I already know the answer, but I feel desperate because I don’t have a pen.

Seeing this, Lin Yan slowly extended his hand towards Hei Nuo: "Let me help you."

"!!!"

Kuronuma suddenly raised his head: "Are you really willing to help me!?"

"Stop talking nonsense...if you want to leave, leave now!"

"Okay...ok..."

In the original plot, the reason why Nezuko can withstand the sunlight is because there are blue red spider lilies near her home, and her family treats blue red spider lilies as ordinary wild vegetables.

Eat a little this year, eat a little next year, and the medicinal properties in the body will accumulate over time to withstand the sunlight after transformation and complete the adaptation.

Because of this, Lin Yan’s first goal was to go to Yunqu Mountain.

He's very fast.

It would normally take an ordinary person several days to walk this distance, but with the help of the map and by running all the way, they arrived in less than half a day.

Just as he expected, there were many blue spider lilies on Mount Kumotori.

Although they are not everywhere in the mountains, there is still one among the weeds.

Before evening, the medicine basket behind Lin Yan was already full.

Just in case, he also "borrowed" two backpacks filled with firewood from residents near Yunqu Mountain.

He didn't run back to the birthing house until the backpack was full.

From a distance, one could see Lin Yan carrying a backpack and two things in his hands, looking like a running rhinoceros!

squeak--

Lin Yan expelled a cloud of dust!

The smoke and dust cleared, and Hei Zan, who was waiting for Lin Yan to come back by the door, saw the red spider lily on Lin Yan's back. His eyes widened and his fingers trembled with excitement.

"Lin...hiss—are these...are these all blue red spider lilies?!"

"Is that enough?" Lin Yan looked at Hei Zan breathlessly.

"Enough! Enough!!"

Chapter 54 The world line has completely changed!!

Hei Zan excitedly helped Lin Yan take off the backpack and the medicine basket in his hand, and kept thanking him.

Looking at Hei Zan who was so excited that he was about to explode, Lin Yan didn't say much, but just told him to focus on making medicine and not think about anything else.

Then he slowly left in the sunset.