The information transmitted from the Mysterious Night Sword made you suddenly jolt with alarm.

"Why can't I fuse with the Earth Source?!!" your consciousness immediately retorted urgently.

That consciousness seemed somewhat confused and extremely weak—you could feel you could easily snuff out this consciousness with a flip of your hand.

After a long while, that consciousness finally spoke intermittently: "Be... because, because I want to fuse! Give it all to me! Hahahaha... give me all the Earth Source!!"

"Damn! Crazy?"

You immediately frowned;

this consciousness's mental state was very unstable.

That consciousness raved wildly for a while before suddenly calming down, murmuring: "No! I can't fuse with the Earth Source, I still need to go back! I must go back!!"

Your eyebrows knitted into a deep furrow: "Even crazier than me?"

Although this consciousness's mental state was extremely unstable, you still planned to try asking some simple questions to see if you could extract some useful information.

You tentatively asked: "Who are you?"

"I, I am... I am Ye Youyun!"

"Ye Youyun, do you like your dad or your mom?"

"I like, I like... I like my little sister!"

"?"

"Little sister, wait for me! I will definitely save you!!"

Ye Youyun let out another bout of neurotic dry howls.

You shook your head;

seeing Ye Youyun in this state required applying some pressure.

Your powerful second-level Mind Evolution Art spiritual energy suddenly released, pressing down entirely on the Mysterious Night Sword.

Ye Youyun immediately quieted down from his frenzy, then conveyed surprise: "Impossible! You're just a martial artist, how is your divine sense so powerful?!"

"Divine sense?" Your expression showed sudden understanding as you continued, "My divine sense isn't that strong, but it's enough to snuff out what little consciousness you have left!"

Ye Youyun remained silent for two breaths: "What do you want to do?"

Your tone was cold: "Ask you a few questions. Don't play crazy with me."

"If I tell you, will you spare me?"

"Don't know, but if you don't talk, I'll kill you immediately."

"...I'll talk."

"Quite sensible. Why did you say not to fuse with the Earth Source?"

"I don't know."

"Don't know?"

"Yes... Ah! Ah—!! I really don't know!!"

Ye Youyun screamed miserably as your divine sense drilled into him.

After a long time, you stopped your attack on Ye Youyun.

"Do you know now?"

The consciousness weakened somewhat: "I really don't know, but please stop attacking!!"

You withdrew the divine sense that was about to strike, keeping it watchfully around the Mysterious Night Sword.

"There's a sentence in my mind that seems related to the Earth Source."

"Speak."

"The high mountain already exists, why look up to it."

"Speak plainly."

"Fusing with the Earth Source has no future."

You asked hesitantly: "What do you mean no future?"

"I don't know anymore. My soul is too weak;

my memories haven't fully recovered!"

You could indeed feel that Ye Youyun's soul was extremely frail, probably only able to exist for a few more decades before completely dissipating.

"Soul? Is there a way to strengthen it?"

"I can't remember."

Your expression froze, but you didn't dwell on it, continuing to ask: "Why can your soul attach to the Mysterious Night Sword?"

"I refined the Mysterious Night Sword into my lifebound sword, which allowed a strand of my soul to attach to it, but it's just barely clinging to life!"

"Refining a lifebound sword?"

Ye Youyun seemed to smile bitterly: "Calling it a lifebound sword, but without spiritual energy to enhance its spirituality, the Mysterious Night Sword is just a sword that can communicate with the mind!"

Hearing Ye Youyun mention spiritual energy, you remained expressionless and didn't say more.

Ye Youyun actively explained what spiritual energy was, describing it vividly and making it sound all-powerful.

You could clearly see that Ye Youyun very much wanted to pique your interest, but you showed no extra reaction, which slightly surprised Ye Youyun.

You continued asking: "How long have you existed in this soul state?"

"Over seven hundred years."

You could basically confirm that Ye Youyun was that thousand-year swordsman.

But you also felt something wasn't right—if Ye Youyun didn't fuse with the Earth Source a thousand years ago, how could he live another two to three hundred years?

Was it really just relying on great luck?

"How old did you live to be?" you asked.

"Over four hundred years old."

"If you didn't fuse with the Earth Source, how could you live so long?"

Ye Youyun was puzzled: "Why do you say I didn't fuse with the Earth Source?"

You didn't plan to reveal that you'd seen Ye Youyun in the Book of Years, answering: "You just said not to fuse with the Earth Source."

Ye Youyun hesitated for a moment before saying: "I fused with two Earth Sources."

"You tell others not to fuse, yet you happily fused with two Earth Sources yourself?"

Ye Youyun also felt somewhat contradictory, hesitating for two breaths before saying: "If I didn't fuse, my lifespan would run out. I didn't want to die!"

"Since you could fuse with two Earth Sources, why not fuse with more to live even longer?"

"I tried fusing with multiple Earth Sources, but later I never encountered Earth Sources with matching attributes, so I failed."

Your heart stirred, realizing that Ye Youyun actually knew that Earth Sources with matching attributes could be fused.

But strangely, other Ultimate Grandmasters didn't know this—why would Ye Youyun know?

Though puzzled, you remained calm: "Why didn't you go find Earth Sources with matching attributes to fuse?"

"I don't know which Earth Sources have matching attributes."

You nodded almost imperceptibly;

it seemed Ye Youyun didn't completely understand the Earth Source either.

At least he didn't know specifically which Earth Sources had matching attributes.

You asked again: "Do you know what the Earth Source is?"

"The Earth Source... what is the Earth Source?! What is it?!!"

Seeing Ye Youyun about to have another episode, you quickly released your divine sense to stop him: "Enough, stop thinking about it!"

With your calming influence, Ye Youyun gradually quieted down.

You suspected that this Ye Youyun didn't even know he had left behind four Earth Sources.

You continued asking: "You fused with two Earth Sources and lived over four hundred years? Who made up that extra hundred-plus years for you?"

Ye Youyun hesitated: "I..."

"Speak, just say it openly. If you don't talk, you die."

Ye Youyun remained silent for a moment: "I only remember that I don't belong here. I belong to a world with spiritual energy. For some reason, I came here, and the spiritual energy in my body gradually dissipated in this spiritless land."

Your expression remained calm: "A world with spiritual energy? So it was the immortal cultivation technique you practiced that made your physical body strong enough to have a longer lifespan even without fusing with the Earth Source?"

Ye Youyun answered: "Yes."

You thought for a moment, your voice low: "If I asked you to give me the immortal cultivation technique, you wouldn't be willing, right?"

"I can give it to you."

You were instead surprised: "So straightforward?"

"I can feel your solid killing intent. If I don't hand it over, you'll really kill me!"

You scratched your head: "You can even sense such subtle intentions? Not bad!"

"I know it's because this world has no spiritual energy that you don't believe it exists, so you think killing me would be no loss."

Ye Youyun's tone became serious: "But I want to tell you, this world will soon have spiritual energy. The immortal cultivation technique will make you invincible in the world!"

Ye Youyun constantly emphasized the importance of the immortal cultivation technique, his purpose somewhat obvious—nothing more than wanting you to spare him and negotiate terms.

Your interest in the immortal cultivation technique was present but not strong, because you believed in your Mozi-ge and Mozi-ge's abilities.

As long as you used Mozi-ge to simulate a few more times, Mozi-ge would definitely be able to produce an immortal cultivation technique for you.

But you were very interested in how Ye Youyun could know the timing of the Spiritual Energy Revival.

Ye Youyun seemed to smile bitterly: "Calling it a lifebound sword, but without spiritual energy to enhance its spirituality, the Mysterious Night Sword is just a sword that can communicate with the mind!"