The Heavenly Pill Demon-suppression Palm could be considered the most formidable Elixir's Skill Du Fei currently knew. Furthermore, when employed by his mental body at this moment, its power should have been immense. However, under those inexplicable attacks just now, the Heavenly Pill Demon-suppression Palm almost shattered! This fact truly left him in awe.

One must understand that what attacked Du Fei earlier was merely the sword spirit of the Qiankun Pill Sword without any specific guidance or control. Just a sword spirit alone possessing such power, if it were to be controlled, its might would be almost unimaginable.

"It seems I've really stumbled upon a treasure this time."

After pondering for a while, Du Fei smiled lightly, then slowly scanned his surroundings.

By now, the silver long swords floating in the sky had once again landed on the ground. The space, resembling a battlefield, seemed to stretch endlessly in all directions.

After a moment of contemplation, Du Fei propelled himself into the air with a step. From this vantage point, he realized the vastness of this ancient battlefield. Everywhere he looked, all he could see were endless hills littered with bodies, each pierced by a silver long sword.

"What's going on here?" He pondered for a while but still had no clue. Without any other options, he arbitrarily chose a direction and swiftly dashed towards it.

"Whoosh—"

Du Fei's figure streaked rapidly through the sky. Below him were decaying corpses that seemingly emitted a foul stench. This space appeared to consist solely of an endless battlefield, devoid of any vitality or hints, leaving one clueless about how to obtain the cultivation method for the Qiankun Pill Sword within.

After what felt like an eternity of darting around, Du Fei finally slowed down. His somewhat numb gaze quickly scanned the surroundings, then he couldn't help but sigh deeply.

In this dimension, he couldn't tell how long he had been wandering. By his estimation, it might have been years.

However, during this time, all he encountered, apart from the corpses everywhere, were the repeated sword rain assaults. Nevertheless, through these recurring assaults, Du Fei had become much wiser. Often, he didn't confront them head-on but skillfully evaded all the attacks.

Throughout this period, Du Fei tried several times to exit this space and give up on comprehension. But every time he attempted to leave, he would encounter a peculiar resistance, preventing his mental strength from departing the scroll's space.

After several trials, Du Fei began to understand. The corpses under his feet weren't there without reason. They were the remains of alchemists who had attempted to comprehend the Qiankun Pill Sword but failed. This implied that if he couldn't grasp the Qiankun Pill Sword, his fate might be the same as theirs.

"No wonder, for a millennium, no one from the Yunshui Du Family could comprehend this. And in the end, the Yunshui Du Family had to auction it off... so this is the reason..." Du Fei suspended in mid-air and paused to reflect. He couldn't help but release a bitter laugh. Then, once again, his gaze slowly swept around.

"Something's not right..."

Halfway through his observation, Du Fei suddenly froze, a look of disbelief on his face.

"Have I been to this place before?"

Staring at the hill beneath him, a peculiar expression formed on Du Fei's face.

All these days, after choosing a direction, he'd been moving straight ahead, feeling that this space was boundless, leaving him feeling somewhat helpless against it. But now, noticing this...

If he had indeed been here before, doesn't it mean he had been going in circles all this time?

Although such speculation seemed far-fetched, it might not be impossible. After all, while the scroll's space was vast, saying it was infinite might be an exaggeration. And if it was merely a spherical space, wouldn't it make more sense for someone to move in circles?

"Spherical?" Du Fei slightly furrowed his brows, and moments later, he gave a faint smile, looking down at the ground beneath him.

"If it's a spherical space, then no matter how I wander, it probably won't make any difference. If I want to break through, I should probably..."

Before Du Fei could finish his words, his body moved, diving downwards. At the same time, the seals in his hands rapidly changed, and suddenly, a golden palm shot down below.

"Boom—"

With Du Fei's palm strike, the scattered corpses on the ground instantly turned to dust, revealing a ground stained with blood. However, cracks now appeared all over that blood-stained ground.

"Again!"

"Boom—"

Another golden palm struck down, widening the cracks on the ground even further. Then, from within the cracks, a faint glow began to emerge.

"Did I guess correctly?" Seeing this, a hint of a smile surfaced on Du Fei's face. Without hesitation, he quickly changed the seals in his hands, and the massive golden palms in the sky kept striking down. In a matter of a few breaths, they forcefully created a huge gap in the ground.

Floating above the chasm, Du Fei clearly saw a vast space below, resembling an underground lake with a soft glow radiating from its waters.

Narrowing his eyes and gazing down for a moment, without any hesitation, Du Fei stepped forward, shooting downwards.

What came into view was a dark cavern. At its center was a colossal piece of amber. The lake's waters were crystal clear, but within the waters, countless sword-like objects swam rapidly, resembling schools of fish.

At the heart of the amber was an island made up of stacked swords. A sinister altar loomed over the island. Atop the altar, a faint light emerged, revealing what seemed like a shining sword within.

His gaze fixated on the island, Du Fei's eyebrows furrowed slightly. After pondering for a moment, he stepped forward, instantly landing on the island.

"Is that... the cultivation method for the Qiankun Pill Sword?" On the small island, Du Fei's gaze settled on the sword seemingly made up of countless characters. After a moment, he inhaled deeply and murmured.

If he wasn't mistaken, that should be the inheritance cultivation method for the Qiankun Pill Sword. He had seen similar inheritance methods before, so he knew that obtaining this method would make cultivating the Qiankun Pill Sword much easier.

"However, I guess it's not going to be that simple, right?" Suppressing the excitement in his heart and hesitating for a moment, Du Fei gave a faint smile, seemingly talking to himself.

After all, he was well aware that he had spent an unknown amount of time trying to find this place. Acquiring the Qiankun Pill Sword might not be so straightforward...

Indeed, as Du Fei's voice trailed off, moments later, a strong gust of wind blew within the sealed cavern from an unknown source. As the gust picked up, the vast lake began to churn rapidly, and the swords within the water started to clash against each other, producing clear and resonating sounds.

Du Fei quickly turned around, his eyes intently watching the scene before him. After a while, he took a slow breath. If he was right, the real challenge was about to begin.

The next moment, a gentle mental strength enveloped Du Fei. Simultaneously, he inhaled softly, his body tensing up in anticipation.

"Come on..."

"Splash—"

The vast lake seemed to tremble slightly, then started rotating rapidly. To Du Fei's slight astonishment, the water in the lake suddenly converged to form a massive humanoid silhouette. As this figure materialized, a deep voice suddenly echoed.

"Hehehe... Excellent, after so many years, since the master sealed me within this scroll space, you are the first to enter here... Hehehe..."

Hearing this chilling voice, Du Fei couldn't help but furrow his brows slightly. If he wasn't mistaken, the entity speaking was this humanoid silhouette before him. However, he was slightly confused: what exactly was this creature?

"Senior! May I ask for your name?" After hesitating for a moment, Du Fei bowed slightly and asked in a deep voice.

"Senior? Senior? Hahaha..." Upon hearing Du Fei's words, the massive figure seemed taken aback and then broke into wild laughter. After laughing for what seemed like a long while, he finally said in a subdued tone, "I didn't expect there to be someone who would call me senior... unexpected indeed... Regrettably, I have no qualifications to be called 'senior' by anyone!"

"Then... who are you...?" Du Fei asked, still with a furrowed brow.

"Who am I? I'm but a mere illusion, a fleeting thought that will dissipate in the world with a mere wave! I can't even be considered a living being, so how can I be called a senior?" The voice seemed oddly detached. After a moment's pause, it continued, "Since you've made it here, I won't hide the truth from you... I am the sword spirit of the Qiankun Pill Sword! If you pass my test, the inheritance of the Qiankun Pill Sword will be yours, and I will dissipate between heaven and earth. But if you fail my test, your body will be sucked into the scroll space and turn into one of the decaying corpses here. Young one... given that you called me 'senior' once, I'll grant you the choice. Will you leave or accept my challenge? Remember, others weren't even given this choice. Don't squander my goodwill!"

Upon hearing this, Du Fei seemed momentarily stunned. He then lifted his head, squinting at the figure before him. In a short time, he seemed to understand a lot. After pondering for a moment with his head bowed, Du Fei's expression remained unchanged. Looking up, he finally replied with a faint smile, "Senior, please don't jest with me! After overcoming countless hardships to reach this place and exerting so much effort to solve the puzzle, it would be a waste of my hard work if I were to just leave. I appreciate your kindness, senior, but I'd still like to give it a try to see if I can obtain the Qiankun Pill Sword!"

"You—"

The eyes of the massive figure seemed to tremble slightly, and it let out an ambiguous shout. After a moment, it seemed to regain its composure and said with a faint smile, "Very well! If you wish to accept the challenge, then I won't stop you. But if you fail, don't blame me for not dissuading you..."

"Then let's begin... I ask you, what is a sword?"