Due to the dispute that broke out previously, everyone was extremely alert along the way and didn't even dare to close their eyes when sleeping.

In this atmosphere of mutual fear, Lin En had no intention of deliberately provoking a dispute. After all, this "ship" was too small. Once a fight broke out on it, it would most likely damage the cabin or the compass in North's hand, and he would have to drift forever on the sea of ​​fog...

North, Hank, Barbara and others obviously understood this, so even though the atmosphere was a bit tense along the way, they still maintained a harmonious attitude on the surface.

It was not until the fourth night that the 'ship' returned to the wizard's land under the cover of darkness.

“I’m finally back.”

After stepping onto the land, Barbara slowly breathed a sigh of relief and felt her legs trembling. The sea of ​​fog was really too torturous. There was nothing there except white fog. Hank even cursed and said that he never wanted to take a boat across the sea again in his life.

"Anyway, everyone has worked hard on this trip. I will present the things I promised you one by one in a few days." North said tiredly.

"You'd better not delay too long..." Barbara reminded him. She had to pay for the purchase of the advanced magic crystal cannon herself, and it was not a small amount.

North simply nodded in agreement, and then ordered his men to arrange several carriages to send the men back to the city overnight.

Lin En had no intention of delaying and immediately returned to his estate in Ladakh.

After returning to the castle in Ladakh, he asked Coleman and others to catch a hundred rats for him to use in biological experiments.

Coleman was dumbfounded by such an order. Where could he catch so many mice? In the end, he had to ask the apprentices who were doing the experiment to stop their work and catch mice in the castle. After working for half a night, they could only catch half of them. They had to go to other places to catch them.

Lin En soon realized the convenience of having a power. Whether it was the potion materials or the mice for the experiment, they were all gathered for him within a few hours...

Taking advantage of this time, Lin En reviewed all the books in the secret room about making the [Source of Magic], and then took out the crystal taken out from the brain of the Eye of Death.

The appearance of the crystal appears to be translucent, with a dark red color, and the surface is covered with strange runes and patterns. One glance at it will make people immersed in it, as if the soul is about to be sucked into it.

Judging from the weight, it is only about 150 grams, which is very light. According to Ladak's notes, it usually takes 30 grams of spiritual essence as material to brew a portion of [Source of Magic].

In other words, these spiritual essences are only enough to make five portions of [Source of Magic Power] at most. It seems like a lot, but if used for experiments, it may not be enough.

Lin En could only save as much as possible and put equal amounts of the spirits of the fire lizard, the griffin and the eye of death into the potion that had been brewed long ago, creating three bottles of [Source of Magic] of different colors.

Then, nine rodents were arranged as experimental targets, with 0.5 ml as a unit, and three of them were in each group, and they were asked to take the corresponding potion.

Maybe it was because there was too little, and after waiting for a long time, it didn't have any effect at all.

And according to the records in Ladakh's notes, this thing should take effect within a few seconds!

Lin En could only slowly increase the dosage until the total amount exceeded two milliliters. Three of the rats immediately started to move and became increasingly violent. One of them even tried to bite through the cage...

Lynn recorded all these changes and then divided the control group into groups.

Of the three rodents in each group, one was dissected on the spot to record the data, one remained the same, and the other continued to increase the dosage for the experiment...

One hundred mice may sound like a lot, but in fact they were not enough for a controlled experiment, and the materials on hand were almost used up in just one night.

The wide laboratory table was piled with rodents in various states of death. Some were dissected by him, while others had died suddenly from taking an overdose of magic potion.

Among them, the gnat that took the Eye of Death potion was the most terrifying. After drinking about five milliliters of the potion, its eyes began to turn red and it screamed something different. Then, it died without any warning half a minute later.

What frightened Lin En the most was that when he was looked at by those red eyes, he even felt like he was facing the eyes of death.

However, he had killed the original body, and Lin En was not afraid of a small rodent. He caught the last experimental subject, forced it to take five milliliters of magic potion, and then performed a live dissection on it without waiting for it to die.

"Is there a strong magical reaction in the brain?" Lin En discovered this unexpectedly.

In fact, any mites that take the potion will show some magical reactions in their brains. This is normal and is also a characteristic of magical creatures, which shows that the formula is correct.

But this morcellot was a little different. The magical reaction in its brain was too strong, even reaching the level of first-ring magic. It could only be described as exaggerated, and then symptoms of brain death appeared.

Lynn took Radak's notes and looked through them. He only found some records about brain death caused by taking potions. There was no mention of why the gnat had red eyes and showed extremely aggressive behavior.

This may be the peculiarity of the Death Eye ectoplasm.

As a potion master, Lakoda has done in-depth research on the [Source of Magic].

Of course, this guy is not as humane as him. He uses human bodies directly for experiments. Many of the missing poor people in the South City are related to this magic workshop. Lakda even experimented with wizard apprentices and accumulated a lot of "experience".

What Lin En was doing was to confirm whether Lakoda had played any tricks in the notes, as well as the strength of the Eye of Death's spiritual essence. Judging from the state of the gnat after taking the potion, the difference was probably more than ten times.

Such a strong medicinal effect made Lin En a little worried.

Thirty grams of spiritual essence is the best ratio determined by the Council's alchemists, which can maximize the effect of the [Source of Magic Power]. However, an effect that is too powerful may cause some side effects.

The violent behavior of the rat before also made him very concerned. After thinking for a long time, Lin En finally decided to create a weakened version of the [Source of Magic Power] and find someone to test the waters...

If there are no side effects, I can take the potion myself...

(End of this chapter)