Instead of taking Yu Xiaogang back to Ning Rongrong's family castle, Li Qing went to a deserted area, threw him on the ground, and then,
billowing black smoke emerged from his hands.
Since the anomaly, his Death Qi had been fissioning daily.
Previously, if the total amount of his Death Qi were gathered, it would be about the size of a billiard ball, but now it was as large as a basketball.
And it could be used without activating his Spirit.
Li Qing formed his fingers into a sword, pointing at Yu Xiaogang on the ground. The billowing black smoke transformed into a swimming dragon and shot out from his finger, entering Yu Xiaogang's body in an instant.
Seeing that it was almost done, he stopped the Death Qi transmission.
The Death Qi, which had been unusually docile in Li Qing's body, became extremely violent in Yu Xiaogang's body, rapidly spreading to every corner of his body.
It frantically devoured his life force.
As his life force rapidly drained, Yu Xiaogang suddenly awoke, his expression revealing a hint of panic, as if he had seen a ghost, his features almost squeezed together.
"Bang!"
Li Qing backhanded a kick squarely on his head, and he fainted again.
He squatted down, placed his sword-finger on Yu Xiaogang's wrist, and with a surge of spirit power, probed into Yu Xiaogang's body to check the changes in his vital signs.
The anomaly of his Death Qi had not been long, but through this period of experimentation, he had discovered some changes.
The Death Qi was very docile in his body, no different from before, and did not exhibit the phenomenon of devouring life force, but once it left him, it would instantly reveal its true nature.
He had tried to transfer Death Qi into various animals.
Their life force would be drained in a very short time, eventually turning them into creatures like the living dead, the only difference from the living dead in Death Canyon being that.
They were not restricted by Death Canyon, and as long as Li Qing wished, he could cut off their last breath at any time.
And after they died, that Death Qi would return to Li Qing's body, and it would be more than the Death Qi Li Qing had transferred into them.
How much more specifically depended on the creature.
After a series of experiments, Li Qing found that the more vibrant the life force of a creature, the greater the increase in Death Qi after its death, as if Death Qi fed on life force.
The more it ate, the faster the Death Qi fissioned.
Why did Li Qing want to conduct human experiments?
Because humans are different from animals and Spirit Beasts; humans have Spirits, while animals and Spirit Beasts do not. He wanted to see if Death Qi would have any effect on Spirits.
He also wanted to try whether his Death Qi could invade when the opponent was on guard, and what the specific effect would be.
This involved his vision for a self-created Spirit Ability. Spirit is a very mysterious thing; no one has yet figured out how it exists, only speculating that it might involve bloodlines.
The Death Qi had clearly spread to every corner of Yu Xiaogang's body, but it did not find his Spirit.
If it couldn't be found, then there was naturally no talk of influence or erosion, or perhaps his Spirit had already been eroded, but Li Qing simply didn't know.
After a moment of thought, Li Qing withdrew all the Death Qi.
"Slap slap—.—"
Li Qing gave Yu Xiaogang several big slaps, directly swelling his face, and he slowly woke up.
"Li Qing!"
Yu Xiaogang gritted his teeth and glared at him, looking as if he wanted to devour him alive.
Li Qing said indifferently, "Come, accompany me to do a few experiments. If you do well, I might spare your life. Anyway, you pose no threat to me."
"Really?"
Yu Xiaogang's eyes widened, and he immediately became energetic. Who would want to die if they could live?
"Less nonsense, release your Luo San Pao."
Yu Xiaogang dared not say more and hastily summoned Luo San Pao.
"Cackle cackle"
Luo San Pao, who had just appeared, was still a bit confused about the situation, but when it saw the black smoke in Li Qing's hands, it immediately let out a series of terrified cries.
"What is that you have?"
Yu Xiaogang looked at the black smoke in Li Qing's hand with curiosity. One must know that even when facing Spirit Beasts far stronger than him, Luo San Pao had never shown fear.
"Don't ask what you shouldn't."
As Li Qing's voice fell, his sword-finger pointed at Luo San Pao, and the dragon-like Death Qi instantly rushed towards Luo San Pao.
Luo San Pao wanted to run, but even if it possessed a certain degree of intelligence, it was ultimately just a Spirit and could not disobey the Spirit Master's will. It could only watch helplessly as the Death Qi invaded its body.
The Death Qi successfully invaded, but Luo San Pao disintegrated, returning to Yu Xiaogang's body.
"What the hell is that thing?"
Yu Xiaogang was greatly alarmed, because Luo San Pao had brought Li Qing's Death Qi into his body, and he could clearly feel his condition rapidly deteriorating.
It was as if he was constantly aging.
Li Qing did not answer, but instead grabbed his wrist and simply probed his condition, only to find that it was no different from directly eroding him.
Death Qi could not affect the Spirit.
Li Qing again withdrew the Death Qi from his body: "Come, cover your whole body with spirit power, and I'll see if it can erode you under the protection of spirit power."
Yu Xiaogang: "..———.
Although he wished he could slap Li Qing to death, he was under someone's roof and had to bow his head, so he could only obediently do as he was told.
Seeing him ready, Li Qing struck out with a palm, his entire hand enveloped in Death Qi.
"Bang!"
Yu Xiaogang flew backward, landing on the grass several meters away, and rolled a few times before stopping.
"Cough cough!"
Wiping the blood from the corner of his mouth, Yu Xiaogang felt that Li Qing was taking personal revenge, but he had no evidence.
Li Qing asked, "How was it?"
Yu Xiaogang felt it and nodded, "Some of it penetrated the spirit power defense, but the amount wasn't large, roughly only a tenth of what it was just now."
Li Qing fell into thought upon hearing this.
It was so difficult to break through the spirit power defense of a Spirit Grandmaster; it would only be harder for higher-level Spirit Masters. However, since there was an effect, it meant his idea was feasible.
The problem now was how to strengthen the erosive nature of the Death Qi.
Next, Li Qing made several more attempts, such as turning the Death Qi into needles, but although the effect improved, it was still far from his expectation.
At this level, let alone transcending ranks, it couldn't even break through the spirit power defense of a Spirit King of the same rank.
Self-created Spirit Abilities were indeed not that easy, even with his advantage of energy like Death Qi. Perhaps he should ask Chen Xin for advice on this matter.
After the experiment, Li Qing looked at Yu Xiaogang.
Yu Xiaogang immediately panicked and stammered, "You—you said you wouldn't kill me if I helped you with the experiment. You can't go back on your word."
Li Qing rolled his eyes: "You believe what I say? You're so old, how can you still be so naive?"
"Besides, I said I wouldn't kill you if you did well, and I'm not very satisfied with the results of this experiment, so it's not breaking a promise."