One month later, at the Butterfly Breeding Facility Research Lab.
Whoosh—!
A chill spread through the air as the solution inside the reagent bottle—mixed with hundreds of medicinal components—began to react violently.
Lin Yang's pupils shrank to the size of needle tips. He stared intently at the reagent bottle in his hand, constantly adjusting his posture in response to the changes in the medicine's properties. He feared that even the slightest mistake would ruin the entire batch.
As the temperature slowly rose, specks of star-like light appeared within the solution, as if a starry sky had suddenly begun to shine in the darkness.
"Ha… Manufacturing medicine is no easy task!" Lin Yang remarked.
He raised his hand, and his blazing soul power instantly enveloped the test tube, precisely controlling the temperature at 28.1°C. Not a single degree higher.
When he gently shook it, the starlight that should have vanished in an instant solidified within the pale blue medicinal liquid.
Clink—!
Lin Yang let out a sigh of relief and placed the finished medicine on the shelf beside him.
Four identical medicine bottles already stood on the shelf—all recent成果 of his research.
Concentration Potion: After consumption, soul masters below the sixth ring can enter a "Focused" state, increasing meditation efficiency by 300%.
All the medicines here could be said to contain the sum of Lin Yang's knowledge and effort so far.
Unfortunately, he had already used up the most critical Star Sky Spirit Grass. It would take another one or two years for the next batch to grow.
The Star Sky Divine Grass was not a true immortal herb, but it ranked at the same level as the Nine-Grade Purple Lingzhi. Even so, it remained a top-tier spiritual medicine.
...
Ice and Fire Yin Yang Well.
After giving Lan Qin a few instructions, Lin Yang tilted his head back and drank the sedative.
As the medicine slid down his throat, a cool sensation instantly spread through his brain, making his mind clearer than ever before.
Without hesitation, Lin Yang jumped into the Ice and Fire Yin Yang Well with a splash.
The Concentration Potion produced the best results when used in an energy-rich environment. Moreover, the stronger the mental power, the longer the effect lasted and the better the outcome.
Enveloped by the ice and fire energies, Lin Yang quickly entered the "Focused" state and began his cultivation.
He rapidly refined the flow of energy, converting it into soul power and continuously accumulating it.
If past cultivation had been like driving a car on a highway, now it felt like riding a rocket at blazing speed.
Of course, this was also thanks to Lin Yang's powerful mental strength.
One day.
Two days.
Three days.
Lan Qin stood guard beside the spring, her Blue Silver Domain expanded to the maximum.
She could clearly sense that the energy of the Ice and Fire Yin Yang Well was gradually decreasing.
Master's aura was growing stronger and stronger.
On the seventh day, the surface of the water at the boundary between red and white suddenly burst open.
Lin Yang leaped out of the spring, wrapped in a thin mist.
His eyes were bloodshot and lacked vitality—a clear sign of mental exhaustion.
"Master," Lan Qin looked at him worriedly.
Lin Yang waved his hand. "I'm fine. Just let me sleep for a bit."
As soon as he finished speaking, he lay down right beside the Ice and Fire Yin Yang Well without caring where he was. The next moment, he fell into a deep sleep.
He was utterly exhausted!
He had pushed the effects of the mental concentration drug to their limit, but at the same time, he had completely depleted his mental power.
For ordinary soul masters, the optimal meditation time was 4 to 6 hours per day. Generally, after 5 hours, soul masters would feel obvious fatigue and cultivation efficiency would gradually decline. After 6 hours, their soul power would begin to dissipate.
At that stage, not only would meditation fail to produce desirable training effects, but the lack of concentration could even lead to danger.
However, the sedative forcibly suppressed the negative effects, causing them to erupt explosively at the end.
There was naturally no danger, but the downside was a headache that would last for two or three days.
Lan Qin said nothing. She simply draped Blue Silver Emperor hairs over Lin Yang's body to make his sleep more comfortable.
After a full day and night, Lin Yang woke up with a splitting headache.
He quickly stuffed a piece of Dragon Blood Leaf into his mouth. After a while, he gradually got used to it.
The sedative had performed better than expected. Combined with the unique environment of ice and fire, it had directly raised his soul power from level 36 to level 39.
He had leveled up three stages at once!
However, it had placed a tremendous burden on his mental energy.
It was like forcibly pushing a civilian engine to rocket-engine speeds. The fact that it hadn't exploded on the spot already proved the engine's high durability.
If the same thing happened twice in a short period, he wouldn't be able to endure it mentally.
Moreover, the longer the medicine was left unused, the weaker its effects became.
He had already found suitable candidates for the remaining three bottles.
After leaving the Ice and Fire Yin Yang Well, Lin Yang summoned Xiao Wu, Dugu Yan, and Ye Lingling, giving each of them a sedative.
The three girls were shocked when they heard about the effects of the Concentration Potion. Wasn't this basically a cheat code for cultivation?
Most importantly, the only side effect was a headache that lasted at most two or three days.
Who wouldn't want such a cheat device?
Ye Lingling hesitated for a moment before saying, "This… this is far too precious. I can't accept it."
Lin Yang smiled and said, "Take it. Apart from the most important medicinal herbs, all the other rare materials came from the Ye family's collection. I can't just take the Ye family's kindness for free."
Nothing is guaranteed to succeed. The same goes for mixing medicines.
According to his calculations, one stalk of Star Sky Spirit Grass could produce roughly ten bottles of Concentration Potion.
However, due to errors during the manufacturing process, he had only obtained four bottles in the end.
Even without considering labor costs, the loss per bottle amounted to about 200,000 gold soul coins.
In other words, Lin Yang had already spent 800,000 gold soul coins on these four bottles of mental stabilizer.
1.2 million gold soul coins had vanished without a trace.
If those gold soul coins were thrown into water, one would hear 1.2 million splashes.
Without support from the pharmaceutical company and the Ye family, the losses alone would have left him in dire straits for quite some time.
Fortunately, he had now nearly completely mastered the knack. If he tried again, the success rate should be much higher.
Hmm… maybe!
Once he entered the "Focused" state, he could not prepare medicine at all. Therefore, Lin Yang chose to cultivate at the Dugu family residence.
Some time ago, that old poison user had gone out to play somewhere, leaving only Dugu Yan in the mansion.
With a poison array guarding the outside and Lin Yang guarding the inside, it was currently the safest place.
The three girls agreed.
In the cultivation room, Xiao Wu, Dugu Yan, and Ye Lingling drank the medicine together.
Almost simultaneously, the three of them suddenly gained insight and sat down to begin cultivating.
Lin Yang could clearly feel the surrounding heavenly energy gathering toward the three girls at an astonishing speed.
Three days later, the three girls woke up one after another.
Ye Lingling was the first to wake. Her cultivation level had risen by two stages—from the original level 27 straight to level 29.
On one hand, her cultivation level had been the lowest; on the other, she had already been just one step away from level 28. The mental concentration drug had simply helped her push open the door a little earlier than planned.
Next was Dugu Yan, whose cultivation level rose by one stage to level 36.
Xiao Wu woke up last. The medicinal effects of the Seven Treasure Glazed Tile Chrysanthemum remaining in her body had been completely refined through this cultivation, allowing her to level up by two stages—from level 33 to level 35.
Despite headaches so severe they made them want to bang their heads against the wall, the three girls' faces lit up with joy upon realizing their soul power had increased.
It had taken at most three or four days, yet it had saved them five or six months—or even more—of cultivation time.
Who would dislike such a sneaky cultivation method? Who wouldn't enjoy it?
Unfortunately, this type of medicine would not be available again for quite some time.