After listening to the System’s warning, Leo’s heart, which had just settled down, started beating fast again.

The urgency to get stronger quickly once again began playing in his mind.

But he soon calmed down. Having died once had made him calmer than in his previous life.

He then took out the five cards he had gained after killing the mutant. One of the cards was an Epic Card.

Mental Power Unlock Card – (Epic Card)

Unlocks the target’s mental power.

"System, what does this card do?"

"Host, it’s written on the card in such simple language, yet you still can’t understand it. Simply put, after using this card, your brain will develop a little."

Hearing the System’s words, Leo knew that he couldn’t get a straight answer.

He decided to use the Epic Card on himself immediately. He figured that whatever this Epic Card unlocked was only going to help him.

"System, use the Epic Card on me."

Soon, the card turned into particles of light, and the moment the particles touched Leo, he immediately felt a sense of warmth and coolness in his head.

He couldn’t quite tell whether the feeling was painful or comfortable.

Suddenly, he heard the sound of chains breaking inside his head, and a sharp pain immediately assaulted his mind. The pain caused Leo to pass out on his bed instantly.

When Leo woke up, he felt surprisingly refreshed. He couldn’t describe the feeling, but it seemed as if his thoughts were processing faster, and even his eyesight felt significantly sharper.

He began moving around and felt that even his reflexes had become smoother.

"System, for how long did I pass out?"

"Host, you have slept for fourteen hours. It is now the next day."

Knowing that he had passed out for such a long time, Leo became more cautious.

"Passing out suddenly for such a long time in this world might prove fatal. I was lucky to pass out inside my truck. If this had happened outside, it would have been dangerous. I have to be more careful from now on before trying something new."

He then took out his Origin Card and checked his status. Previously, where it had shown Mental Power – (Locked), Leo could now see his mental power.

Mental Power – 7

"System, what is the average mental power of a human?"

"Host, most humans in this world would have a mental power of 2–3. Since you have crossed over and the System helped assimilate your body and soul, you possess a higher mental power."

Leo understood the System’s explanation.

He then began checking the four remaining cards.

Before, he hadn’t realized it, but now, upon careful observation, he noticed a card that was a mix of orange and black in color. He checked the card and was instantly surprised.

Skill Card – Regeneration (Rare Skill)

Description: A passive skill that gradually restores the user’s injuries over time. Minor cuts, bruises, and muscle strain heal noticeably faster, while serious wounds require extended periods of rest and energy.

The skill cannot instantly regenerate lost limbs or fully heal life-threatening injuries. Excessive damage can overwhelm the regeneration process, reducing its effectiveness until the user recovers.

"System, is this the mutant’s skill?"

"Congratulations, Host. This is a rare skill of the Abyssal Demon Race. Although it is a much inferior version of the skill, the mutant you killed must have possessed the Abyssal Demon Race bloodline."

"So you mean there is a stronger version?"

"Yes. The stronger version of this skill is extremely rare, but the leader of the Abyssal Demon Race possesses it. They can regenerate even from a single drop of blood."

"Holy shit, isn’t that overpowered? How can someone kill somebody like that?"

"There are ways to kill them using curses and various other methods, but Host, right now you wouldn’t even be considered a speck of dust compared to those beings."

"The System advises the Host not to think too far beyond his league."

Leo realized that what the System said was right. Right now, even normal zombies were a threat to him, let alone beings capable of regenerating from a drop of blood.

He cast these thoughts away from his mind and checked the remaining cards.

Rare Card – Physique +1

Rare Card – Constitution +1

Rare Card – Constitution +1

"Oh, these cards give me stats. System, by the way, what is the use of Constitution in my status?"

"Host, Constitution is one of your most important stats. If you have a stronger Constitution, you can naturally resist all kinds of viruses, poisons, and curses."

Leo nodded.

"System, use all these cards on me."

Soon, all the cards turned into particles of light and were absorbed into Leo’s body.