I have changed my destiny and become an unparalleled immortal.

"Swish, swish, swish!"

In the quiet side hall, only the sound of pages being turned frantically could be heard.

He was like a giant sponge, frantically absorbing the accumulated resources of the cultivation world over millions of years in an extremely terrifying, almost predatory manner!

You've got the basic rune explanation!

The essence of talismans is to seal small fragments of the laws of heaven and earth onto talisman paper using spiritual power and cinnabar.

After being tempered by the Thirteen Pearls of the Purple Mansion, Gu Yun's soul could draw talismans with ease!

I have thoroughly understood the orthodox essence of the Five Elements magic!

Fireball, Water Prison, Earth Spike.

He had memorized the energy flow routes of these Five Elements spells!

"Although my dantian is currently empty, and I can't cast a single spell, as long as I thoroughly understand all these theories, and once I rebuild my dantian's spiritual power, I can instantly become a magic-wielding turret proficient in all spells!"

As Gu Yun frantically flipped through the book, the corners of his mouth couldn't help but turn up in a wide smile.

"At that time, on the surface, I'll be a brute force cultivator who can smash mountains with a single punch. But when the enemy thinks I'm going to fight hand-to-hand and starts to distance themselves to kite me..."

"I'll just throw out a trapping formation with a flick of my wrist, hold the Five Thunderbolts Talisman in my left hand, and conjure an explosive fireball with my right, teaching them what it means to be an all-powerful rogue in the cultivation world!"

Working day and night.

For seven days and seven nights, Gu Yun did not step out of the side hall once.

When hungry, they would nibble on the monster jerky that Gu Chengfeng had given them; when thirsty, they would drink a mouthful of spiritual spring water.

Dusk on the seventh day.

After finishing her business with the Cold Moon Palace, Mo Qianyan remembered the man who had vowed to repent and study in seclusion. Feeling a little worried, she came to the side hall herself.

"There's been no movement for seven days. Given his volatile temper, could he have gone mad from studying those tedious array diagrams?"

Mo Qianyan gently pushed open the palace door.

However, the scene before her left this Ice and Snow Sword Master stunned on the spot.

Inside the large side hall, thousands of jade slips and ancient books were neatly stacked and categorized.

In the center of the hall, a burly man with bare chest and long silver hair was sitting cross-legged with his eyes closed!

There was not a trace of spiritual energy fluctuation around him, but he used his vast, almost materialized divine sense to draw complex golden array patterns and talisman phantoms in the void!

Not only that, his hands were also unconsciously forming various complex hand seals of the Five Elements spells. Each hand seal was precise and perfect to the extreme, even more so than those transmission elders of the Cold Moon Palace who had studied for decades!

"this……"

Mo Qianyan's beautiful eyes widened slightly, her red lips parted slightly, and her face was full of disbelief.

She clearly remembered that seven days ago, this man didn't even know what a spirit-gathering array looked like!

In seven days, he not only thoroughly mastered all the knowledge on the first to third floors of the library, but also deduced in his mind to the point of complete understanding.

"This is no ordinary body cultivator who only knows how to fight and be fierce."

Mo Qianyan looked at the man who exuded a mysterious aura, and her heart skipped a beat.

"This is clearly a once-in-a-millennium prodigy of enlightenment!"

Mo Qianyan stood at the entrance of the side hall, while Gu Yun, whose hands were still instinctively forming hand seals, had a strange light in his cold eyes.

Just as she was about to call out to wake him.

Gu Yun, who was in mid-air, suddenly shuddered and abruptly stopped forming hand seals.

"call!"

Gu Yun let out a long breath and slowly opened his tightly closed eyes.

In that instant, countless complex golden array runes and phantom images flickered faintly in his eyes, which did not completely disappear for a full three breaths.

He landed steadily on the ground, just about to show off his achievements over the past seven days to his wife at the door, when his divine sense subconsciously swept over his Purple Mansion Sea of ​​Consciousness.

In the center of his mind, the blood-red butterfly mark had completely dimmed, as if it had fallen asleep after eating and drinking its fill.

Beneath the red butterfly, several lines of dark gold, wildly cursive characters imbued with the ruthless laws of heaven, floated glaringly:

[The in-depth deduction of the Great Evolution Butterfly Transformation Divine Soul will begin for seven days.]

[In the seven days outside, the soul experienced as if fifty years of spring and autumn had passed, exhausting all deductions.]

[Equivalent exchange, deducting lifespan: fifty years!]

[The subject's current total lifespan: 323 years.]

"Damn you, you wicked god!"

Gu Yun's smug expression froze instantly, and a bloodcurdling roar erupted in her heart, her heart aching as if it were bleeding!

Fifty years!

I fought tooth and nail in Sunset Swamp and the Cave of Ten Thousand Bones, killing demonic cultivators and slaying old monsters, and finally managed to accumulate this wealth over the past few hundred years.

After reading for only seven days, this damn butterfly silently deducted fifty years of my lifespan as tuition?!

As lifespan was depleted, an extreme sense of exhaustion from the depths of the soul suddenly struck.

"Hmm."

Gu Yun stumbled, her body swaying slightly.

"Gu Yun!"

Upon seeing this, Mo Qianyan abandoned all pretense of being the Ice and Snow Sword Master. She transformed into a streak of white light and instantly rushed to his side, supporting him.

She eagerly extended a wisp of her divine sense to scan Gu Yun's body, only to find that Gu Yun's blood and qi were still surging like an ancient ferocious beast, and his wild and untamed body was full of vitality.

Looking at his face again, because he had taken the top-grade anti-aging pill given to him by Huangfu Jue, he still looked like a handsome and otherworldly man in his early twenties, without a single wrinkle or gray hair.

His physical body was flawless, and his appearance showed no signs of aging.

The only abnormality was that his spiritual fluctuations were extremely weak, which clearly indicated that his mental energy had been overdrawn to the limit.

"You scared me to death!"

Mo Qianyan breathed a sigh of relief, then glared at him with annoyance.

"You can exhaust your spiritual energy like this just by looking at a basic array diagram? Did you rely on your powerful soul and force yourself to deduce those advanced arrays for seven days and seven nights without resting for even a second?"

Gu Yun felt incredibly bitter listening to Mo Qianyan's scolding.

What could he say?

Honey, I was so engrossed in reading that I didn't notice the system deducting fees. Did I accidentally lose fifty years of my life?

If this were revealed, not only would the secret of the Book of Fate be exposed, but Mo Qianyan would probably go crazy on the spot.

Gu Yun's eyes darted around, and he went with the flow, leaning most of his body against Mo Qianyan's soft, delicate body, pretending to be weak with a splitting headache.

"Your Majesty is right. I just want to quickly master my skills so that I can be worthy of you, the Palace Master."

Gu Yun took the opportunity to bury his head in Mo Qianyan's neck and rub against her, shamelessly playing the victim.

"For the past seven days and seven nights, I've gone through all the texts from the first to the third level in my mind countless times. My spiritual energy is almost completely depleted. Ouch, my head hurts so much, Madam, please rub it for me."

Mo Qianyan's ears turned slightly red from his rubbing. The words of reproach that were originally on the tip of her tongue turned into helplessness and heartache.

She reached out her cool, jade-like hand and gently pressed it on Gu Yun's temples to soothe his mental fatigue, her tone softening as she spoke.

"You reckless fool! Cultivation is all about gradual progress. No matter how high your comprehension, you shouldn't be so impatient for quick results. If you damage your soul and foundation, what will happen to me... what will happen to Chengfeng?"

"Don't worry, Madam, I know what I'm doing. Although my spiritual energy is a bit depleted, the suffering I've endured these past seven days hasn't been in vain."

Gu Yun straightened up, a glint of light flashing in his eyes.

He clenched his right hand into fingers, without using even a trace of spiritual energy, and with only the remaining powerful divine sense, he made a sudden slash in the void!

"Buzz!"

A faintly glowing phantom of a second-order trapping array pattern actually condensed in mid-air. Although it quickly dissipated due to the lack of spiritual power, the flawless array pattern was unmistakable!

"Divine sense forming an array?!"

Mo Qianyan's beautiful eyes widened, and she gasped.

As a sword master who had reached the half-Nascent Soul stage, she naturally knew what this meant.

Being able to inscribe third-order array patterns in the void without any blind spots using only divine sense means that Gu Yun has thoroughly mastered the theory of array formations in the past seven days and has reached the level of an array master!

However, if he could use spiritual power, he would be able to immediately set up a killing formation that would give even Golden Core cultivators a headache!

"I've memorized the formations, the principles of elixirs, and the patterns of talismans."

Gu Yun grinned, though inwardly he was still bleeding for the fifty years he'd lost, his face remaining arrogantly defiant: "Once I find a chance to patch up that hole in my dantian, anyone who dares say your husband is just a body cultivator who only knows how to throw wild punches will be taught a lesson with a Five Thunderbolts Talisman!"

Mo Qianyan was both annoyed and amused by his smug look.