The undead hid their secrets from the ceiling, much to Alec's surprise.

A pillar of fire erupted from his hand.

Soon, the vines that covered the wall were burned away, and a spell circle of considerable size appeared in front of him. But to Alec's surprise, this circle was not the expected isolation or concealment circle, nor was it a teleportation or coordinate system, but an illusion circle, or more precisely, a circle similar to an engram.

Alec took out a few soul coins and filled them in the power supply area of the formation.

The circle was quickly activated.

A wizened lich appeared in front of him, and from the background behind the lich, it appeared to be in a large tower.

The old lich didn't speak, as the circle didn't have the ability to record sounds...... Judging from the structure of the formation, the person who carved this formation changed the pattern that recorded sound to a pattern that recorded the flow of energy.

It made its way up the tower, and eventually entered a laboratory, where several young lichs were waiting for it. There are a lot of things in the laboratory, Alec looked at it a few times, and found with some confusion that among the spell items prepared by the old lich, the casting materials of undead spells accounted for very little, but the materials of the life system accounted for the majority, and in addition, there were a small number of soul materials.

What's to be done?

It seemed to be some time before the experiment began, when the old lich went out and entered the lab with a young necromancy.

The young wizard was terrified, crying out for something...... But the lich was visibly unmoved, and with a wave of his bone-wand, a white bone cage rose and imprisoned the young necromancer. Then, he threw another spell, and the young wizard in the cage was hit by the spell and fell to the ground in a groggy state, and several lichs took the opportunity to enter and take all the spell equipment from him.

It was a while before the old lich began the experiment.

It took out a rabbit and showed it off, then it held up the spellbook in its hand and showed off the spell it was about to use.

【Undead Transformation】

The gray energy quickly enveloped the rabbit.

The flame of life on the rabbit was quickly extinguished, but the gray magic had not yet dissipated. Alec knew that the magic was trying to transform the rabbit into an undead...... Not just a physical transformation, but a deep transformation of the soul.

Soon, a weak undead rabbit appeared in the laboratory.

Later, the old lich showed the spell book in his hand again.

A complex spell model appeared in front of Alec, but this time, he failed to recognize the spell that the lich was about to use, but from the spell model and the spellcasting items, he could tell that this spell should be a life spell.

A lich who wields life-based spells.

Alec's face was a little strange.

After a period of preparation, a rich cloud of emerald green life energy appeared in the lich's hands.

The surrounding lich stared at this mass of energy in horror, light and life energy are the nemesis of the undead, Alec didn't know how the old lich overcame his own obstacles and gathered this energy, but he could easily see that the life ability also caused damage to the old lich...... A wisp of black smoke rose from the lich's hand, and from time to time there was a flash of fire on his dead wood-like bones, and the life energy and the power of the undead themselves clashed, and this conflict brought about energy confrontation, and then exploded.

The old lich carefully controlled the energy and threw it on the undead bunny.

A ball of fire burst open, and the undead rabbit's body was torn apart in the flames. The old lich seemed to have expected it, and he unhurriedly clasped the table with his hand, and a pale blue circle rose, imprisoning a cloud of gray soul energy in it.

This is the soul of that rabbit.

The soul of life is light blue, which is the most primitive state of soul energy, and the soul of demons and devils is red, and only the soul of the undead will present this strange gray.

At that moment, several young lichs gathered around, as if to accuse something.

But the old lich didn't argue, silently raising his staff and starting the next spell cast.

Another mass of life energy appeared in his hands.

Under the guidance of the spell book, this mass of life energy quickly formed a complex spell model, and then landed on the gray soul...... This time, the reaction was much smoother, and a trace of gray energy was stripped out of the soul, and in just over ten minutes, the gray soul energy returned to light blue.

This strange change made Alec a little stunned.

"Soul Extraction...... No, this seems to be a reverse conversion of the undead? ”

He was a little undecided, although the lich showed the spell model, he was not familiar with life-type spells...... Well, to be precise, I don't know anything, and this conclusion at the moment is just speculation.

The old lich's experiments continued.

He took out a bottle of holy water, which, judging from its concentration, was probably the highest level of holy water.

The pale blue soul was thrown into the water and subsequently reduced to ashes in the white light...... The holy water contains the power of the Light, which, like the vibrations, is the nemesis of all the dead. The rabbit's soul seems to be purified by life energy, but in fact, this purification is not complete, in the holy water, the undead breath hidden in the soul energy has nowhere to hide, and then the entire soul is turned into ashes in the holy light.

But the experiment isn't over yet.

Soon, several lichs brought new experiments.

A palm-sized lizard, a rabbit, and a human.

The old lich was patient, and it repeated its previous move, transforming the three living beings into the undead, and began to purify the three souls with a spell...... Once these steps were completed one by one, it once again purified the three groups of souls with a spell and threw them into the holy water.

The souls of humans and rabbits were still reduced to ashes, but the soul of the lizard remained.

A group of lichs looked a little excited.

The old lich remained calm, and he took out a lizard again, and extracted its soul, and then injected the purified lizard soul into the lizard's body.

A faint flame of life rekindled in the lizard's body.

The experiment is not over yet.

But the white mist gradually poured into the tomb and gradually enveloped Alec, and by the time he came back to his senses, he had unconsciously left the world of memory.