What Kind of Sin Is This

Meng Yan was instantly shocked: "Have you gone mad? You used up all your demonic energy? Didn’t I tell you to take it slow? Now Gu Qingfeng will definitely notice something’s off. If he reports it to the Sword Sect, the Sword Demon’s plan will be ruined."

Ling Fei'er scoffed. "No need to panic, Uncle Meng. You didn’t see the look on Gu Qingfeng’s face—that lecherous devil. His mind is filled with nothing but cultivation; there’s no room for anything else."

Meng Yan gave her a strange look. "Judging by the way you’re limping, I can imagine."

Ling Fei'er stiffened, her face flushing red and then pale with anger. "Do you have the Human-Demon Pills or not?"

Without another word, Meng Yan handed her a small porcelain vial. "I only have three Human-Demon Pills left. I was saving them for a breakthrough, but for the sake of the Sword Demon’s plan, I’ll give them to you first."

Ling Fei'er stared at the vial in her hand, her beautiful face twisting into a sinister expression. "Just you wait, Gu Qingfeng. Once I take this medicine, I’ll definitely take you down!"

......

After a full day of cultivation, Gu Qingfeng returned to his cave abode.

Nangong Xue knew many sword formations—unsurprising for the Sword Sect’s Holy Maiden. She truly had real talent.

But no matter how complex the formations were, Gu Qingfeng mastered them at a glance, learning at an astonishing speed. He estimated that in another ten days or so, he’d have drained Nangong Xue of all her knowledge.

Then he could challenge the Sword Tower directly. Even if his cultivation hadn’t reached the peak of the Human Yuan realm, it wouldn’t matter. With his current strength, no prodigy in the Human Yuan realm could withstand a single punch from him—not even the legendary freaks of history.

Because he was a cheater.

As soon as Gu Qingfeng stepped into his cave, he froze. A delectable feast lay on his bed, looking utterly irresistible.

"Uncle Gu~, you’re finally back. I’ve missed you so much~."

"You’re here again? I thought you’d be bedridden for days."

"After our last cultivation session, I gained so much. That’s why I’ve come again, despite the hardship, to seek your guidance."

Gu Qingfeng grinned. This was perfect—he’d gained a lot too.

And so, the two began their arduous cultivation once more.

The result? Ling Fei'er consumed all three pills in one night, while Gu Qingfeng’s physique skyrocketed.

The fact that Ling Fei'er had taken pills left Gu Qingfeng baffled. He’d only ever heard of men using pills to aid cultivation—who knew women in this world did the same?

Ling Fei'er, her demonic energy utterly depleted, was on the verge of tears. She couldn’t understand—why?

Three Human-Demon Pills, and still, Gu Qingfeng showed no signs of demonic corruption. Had all that demonic energy been fed to a dog?

Then it struck her—what if he was already so demonic by nature that the corruption simply didn’t show?

After all, demonic transformation amplified one’s desires and negative emotions.

Judging by Gu Qingfeng’s usual behavior, wasn’t he just a demon wearing human skin? His lust and wickedness were already at their peak—how could they be amplified further?

It was like writing with black ink on black paper—you wouldn’t see a difference!

The more she thought about it, the more convinced she became.

Perhaps the groundwork was already laid. It was time to use the Demon Seed.

The process of turning someone into a Human-Demon involved first corrupting them with demonic energy to create a suitable environment, then implanting the Demon Seed and waiting for it to take root.

Ling Fei'er decided to try—but hesitated. The Demon Seed was precious; she only had one. If it failed, it would be wasted.

But if she didn’t try, she’d never quell the hatred in her heart. That pair of dogs, Gu Qingfeng and Nangong Xue—flirting all day, then coming to her at night to vent their desires.

The mere thought made her heart ache with fury. Gritting her teeth, Ling Fei'er stealthily retrieved the Demon Seed from behind Gu Qingfeng’s back.

Seizing the right moment, she sent it into his body.

But the instant the Demon Seed entered him, the system devoured it.

A notification blared in his mind.

Ding!

Host has been attacked by a Demon Seed.

Congratulations! Host has acquired the divine ability—[Demonic Seed in the Dao Heart]!

Gu Qingfeng was stunned. What was this? Weren’t they just boosting his physique?

Since when did a divine ability pop up?

After absorbing the information about Demonic Seed in the Dao Heart, everything became clear.

The ability allowed him to condense a Demon Seed and implant it into a cultivator’s Dao Heart. If their Dao Heart had flaws, the seed would take root, corrupting them into a Human-Demon.

But there was a catch—the target’s Dao Heart had to have cracks. As the saying goes, flies don’t attack an uncracked egg. The Demon Seed was the fly; the Dao Heart was the egg. No cracks, no entry.

Alternatively, even if the Dao Heart was intact, if the cultivator’s resolve was weak, demonic energy could first corrode them, paving the way for the seed.

Now Gu Qingfeng understood—Ling Fei'er must have secretly implanted a Demon Seed in him, trying to turn him into a Human-Demon.

Heh heh heh...

Where else could he find a little demoness as good as Ling Fei'er?

Not only did she provide attributes, but she even delivered divine abilities!

With Demonic Seed in the Dao Heart, couldn’t he now create Human-Demons for his own cultivation?

Gu Qingfeng was ecstatic—but his joy didn’t last. He soon realized that Demon Seeds weren’t something he could just conjure. They were refined from inner demons, and with his current methods, he couldn’t produce them.

In other words, this divine ability was like an empty gun—no bullets.

Still, the thought of inner demons reminded him of Senior Sister Lin. Maybe when she faced her inner demon tribulation, he could reap a bountiful harvest.

Ling Fei'er waited for Gu Qingfeng to transform into a Human-Demon, but after a long time, nothing happened.

She was devastated. Her precious Demon Seed—wasted! A gift from the Sword Demon himself!

How could she face him now?

The next day, dazed and limping, Ling Fei'er couldn’t even recall how she’d left Gu Qingfeng’s cave.

She went to see Meng Yan and told him everything.

When Meng Yan learned the Demon Seed had been wasted, he flew into a rage. "Do you have any idea how rare Demon Seeds are? Even the Sword Demon expends great effort to create just one!"

Ling Fei'er slumped, her head bowed. Once a proud genius, she had suffered unimaginable humiliation at Gu Qingfeng’s hands.

Not only had she failed in her mission, but she’d lost her purity, wasted the Demon Seed, and endured constant taunts about Nangong Xue. The thought alone made her want to cry.

And so, she did.

Meng Yan frowned at the tearful, unsteady Ling Fei'er. He’d intended to punish her, but in the end, he couldn’t bring himself to do it.

"Ah, what kind of karma is this?"

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