The Hehuan Sect cultivates alchemy; my senior sister helps me refine alchemy throughout the world.

Shen Yifei didn't care at all. He had already gone through the trials of the Transcendent Realm, so why would he care about two demon kings in the mid-stage of the Mahayana Realm?

"Let's give it a try!" he said, taking off his clothes. "Today's training, both of you sisters, you'll do it together!"

Upon hearing this, even the usually composed Leng Shanyue's eyelids twitched. Bai Lu, on the other hand, chuckled and threw the wine jug in her hand to the ground. She strode over to Shen Yifei with her long, straight legs.

Leng Shanyue didn't move, standing there with no expression on her face, but her eyes were fixed on Shen Yifei's dantian.

She is a nine-tailed fox, and is more sensitive to changes in aura than Bailu.

The energy in Shen Yifei's dantian made her uneasy; it was a strange mixture of spiritual and demonic energy.

Bai Lu ignored all that, slowly licked her lips with the tip of her tongue, and then whistled.

The whistle was crisp and bright, echoing three times in the valley before dissipating.

"What are you whistling for, you snake demon?" Leng Shanyue said from behind.

"I'm willing." Bai Lu retorted to Leng Shanyue without turning her head, then squatted down, reached out and poked Shen Yifei's belly, her fingertips carrying a slightly cool demonic power as she probed inside.

She tilted her head and looked at Shen Yifei, "Are you sure you've practiced dual cultivation with a demonic cultivator? Did you get tainted by something unclean? I felt something was off about you earlier; why was there demonic energy in your dantian? Aren't you a righteous cultivator?"

"It's a long story, I'll tell you all about it later." Shen Yifei lay down on the ground, resting his head on his arm, adopting a "take it or leave it" posture. "Are you done yet? Hurry up!"

"Hehe, you want to challenge your older sister?" Bai Lu turned and glanced at Leng Shanyue. "Have you watched enough? Are you coming or not?"

……

……

Things then got a bit out of control.

At first, everything was normal, and the demonic power and spiritual energy among the three of them blended very smoothly.

Suddenly, the small vortex in Shen Yifei's dantian began to move.

The gray vortex, like a ferocious beast with its jaws wide open, fiercely sucked in the two streams of demonic power. Bai Lu and Leng Shanyue's demonic power instantly surged uncontrollably towards his dantian.

"What the hell are you doing?" Bai Lu slapped Shen Yifei on the chest.

Shen Yifei opened his mouth, but couldn't utter a single word. It wasn't that he didn't want to speak, but that he couldn't utter a word. The small vortex in his dantian was spinning too fast, and he froze completely.

Leng Shanyue bit her lip, her expression complex. The feeling of her demonic power being drained was unpleasant, but after the gray mist circulated within her body, a large portion of the impurities in her dantian was removed.

"Don't panic." Leng Shanyue pressed Bai Lu's shoulder. "He's helping us purify our demonic energy."

"Purification my ass! My cultivation is about to drop!"

"Feel it for yourself."

Bai Lu closed her mouth and looked inward at her dantian.

The demonic power has indeed decreased, but the remaining portion is much purer than before.

Shen Yifei was finally able to speak, "Sisters, I have something growing in my dantian that I can't control. If you can't handle it, then retreat, don't force yourself."

"Screw you." Bai Lu gritted her teeth. "I want to see how much your dantian can absorb."

The three of them just stubbornly endured it.

The small vortex spun for a full hour before its speed gradually decreased.

Bai Lu had 30% of her demonic power drained, and Leng Shanyue had 40%. Their cultivation levels didn't drop, but while the amount of their demonic power decreased significantly, its purity more than doubled.

Shen Yifei himself was also feeling bad.

The small vortex absorbed so much power, churned it into gray mist, and then expelled it. His meridians were stretched like inflated balloons, and every inch of his body ached.

When the small vortex finally stopped, all three of them were paralyzed.

Bai Lu lay on Shen Yifei's chest, covered in sweat. Leng Shanyue lay beside him, panting heavily, her chest skin covered in black blemishes.

Shen Yifei lay in the middle, embraced on both sides, his body feeling like it was falling apart. The small vortex in his dantian quieted down, shrinking into a tiny dot and becoming still.

"How are you two feeling, sisters?"

Bai Lu lifted her head from his chest. "Your demonic power is purer, but it's less. Your cultivation level hasn't dropped, but it will take time to replenish it."

Leng Shanyue stood up and jumped directly into the pool. "Once my demonic power recovers, I should be able to break through!"

Bai Lu stared at Shen Yifei's dantian for a long time, "Can you control that thing in your stomach?"

Shen Yifei closed his eyes and sensed it.

The small vortex in his dantian shrank to a tiny dot, remaining quietly still. He tried to touch it with his spiritual energy, and the dot moved slightly, beginning to slowly rotate.

"It can be controlled!"

"Spin it around so I can see."

Shen Yifei activated his spiritual energy, and the small dot began to rotate, though at a slow speed.

Bai Lu reached out and placed her hand on his dantian, probing it with her demonic power. Just as she touched the edge of the small vortex, a suction force came, and a small wisp of her demonic power was drawn in.

She withdrew her hand, her eyes lighting up.

"This thing of yours is a good one."

"Sister, I don't think this is good. If things continue like this, who will want to cultivate with me? They just start absorbing everything right away. If you're strong, you'll be drained in no time if you're weak." Shen Yifei said helplessly.

"Can't you learn to control it? Turn it when it should turn, and leave it to its own devices when it shouldn't. But if this thing is used in..."

"What's the point? I feel like it's just a burden. I'm having fun, but I have to keep an eye on it all the time. Who knows if it'll start spinning on its own?"

Bai Lu smacked his head. "All you ever think about is this stuff. Can't you think about anything else? Do you think if this thing fought someone, wouldn't it absorb their spiritual energy?"

Shen Yifei thought about it and realized, "That's right, from this perspective, this thing is indeed a good thing!"

He jumped up from the ground. "From now on, will I be fearless in a fight?"

"Yeah, when you run out of spiritual energy, you absorb it from others, but if you encounter someone with a higher cultivation level, well, that's another story!"

Shen Yifei chuckled, "Looks like good things need to be used in the right place."

Bai Lu rolled her eyes at him. "Alright, stop daydreaming. Figure out what this thing actually is first."

Shen Yifei sat cross-legged and closed his eyes to focus his inner energy on his dantian.

The small vortex spun slowly, and when he tried to channel some spiritual energy into it, the vortex immediately began to spin faster.

"Haha, it's that simple! Let's see who dares to fight me now!"