Lin Fei's Saber Domain continued its expansion. Covering a radius of one mile, then five miles, and finally ten miles...

It was only at about ten miles that the Saber Domain began to strain.

"That should be its limit, a radius of ten miles!"

Lin Fei pondered. His Saber Domain, spanning ten miles, was truly awe-inspiring. Within this domain, Lin Fei was the true sovereign! With a mere thought, everything within the ten miles could be reduced to ashes!

This was the might of the Saber Domain! In some respects, the Saber Domain could even rival certain supremely powerful Divine Abilities, if not surpass them.

"Whoosh."

At that moment, two figures appeared in the void. It was the Sect Master of the Ancient Origin Sect and the Wind Sovereign. Both wore expressions of profound shock as they gazed upon the sea of flames consuming the void. These were real flames, not mere illusions.

"Sovereign Lin, what are you doing?"

The Sect Master inquired. Just approaching Lin Fei, he felt an immense pressure bearing down on him. It must be noted that both he and Lin Fei were at the Martial Sovereign level. Yet, the Sect Master's realm was even higher than Lin Fei's. Despite that, standing beside Lin Fei wasn't easy for him.

"Sect Master, Wind Sovereign, I was merely evolving and testing the limits of my Saber Domain," Lin Fei replied calmly. He had intended to test the limits of the Saber Domain, and hence, had no thoughts of concealing it.

"You... evolved the Saber Domain?"

"This... is the result of your evolution?"

Both the Wind Sovereign and the Sect Master exchanged a glance, their gazes fixed intently on their surroundings, where flames danced wildly.

Wind Sovereign even reached out and caught a wisp of flame.

"Sss."

The flame extinguished. Yet, a burn mark appeared on the Wind Sovereign's hand. While the flame couldn't truly harm the Wind Sovereign, he, who knew his own body inside and out, could distinctly feel the pain. He had genuinely been burned.

"It's a real flame, not an illusion. From illusion to reality... this truly is the Saber Domain..."

Wind Sovereign's tone was filled with astonishment as if he couldn't believe what he was witnessing. He knew of Lin Fei's formidable saber momentum. Lin Fei had comprehended saber momentum quite early and was perhaps extremely gifted in it. But evolving saber momentum into the Saber Domain? That was incredibly challenging!

After all, it entailed the transition from illusion to reality. Even the Wind Sovereign and the Sect Master of the Ancient Origin Sect, or for that matter, all the Martial Sovereigns of the current and past generations of the Ancient Origin Sect, none had evolved their martial momentum into a true martial domain. Not a single one!

"Sovereign Lin, is this truly the Saber Domain?" The voice of the Ancient Origin Sect's Sect Master trembled, overwhelmed with emotion.

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"Whoosh."

In the next moment, Lin Fei vanished, only to reappear instantly in front of the Sect Master and the Wind Sovereign.

"Is... Is this teleportation?" Both were visibly shocked.

This wasn't just immense speed. It was true teleportation. No martial technique or spell known could achieve this instantaneous movement. But Lin Fei had done it.

"Within the Saber Domain, I am the sovereign!" Lin Fei stated calmly. He had deployed the Saber Domain, and within it were the figures of both the Wind Sovereign and the Sect Master of the Ancient Origin Sect. But inside the Saber Domain, Lin Fei felt that neither of them posed the slightest threat to him. If he wanted, he could probably kill both Martial Sovereigns quite easily, perhaps even effortlessly.

Without the Saber Domain, trying to kill a Golden Core True Person or another Martial Sovereign would be extremely challenging unless one's power truly surpassed the opponent's by at least tenfold, only then could one possibly kill a Martial Sovereign or a Golden Core True Person. But with the Saber Domain, all these challenges seemed trivial.

Of course, this was also because the Wind Sovereign and the Sect Master of the Ancient Origin Sect weren't particularly strong. If someone possessed two, three, or even four Great Divine Abilities, they could likely shatter Lin Fei's Saber Domain with ease. Then, Lin Fei's Saber Domain wouldn't stand a chance.

But those capable of mastering two or more Great Divine Abilities were no ordinary individuals. They would undoubtedly be top-tier geniuses with ambitions of becoming Martial Kings, or perhaps they even possessed the bloodline of a Martial King, inheriting some of its Divine Abilities. That would be on a completely different level.

"Excellent, this is truly wonderful!" exclaimed the Sect Master. "Once a Martial Sovereign evolves a Saber Domain, it's equivalent to mastering two or even three Great Divine Abilities. In the history of the Ancient Origin Sect, the most powerful have only ever mastered two Great Divine Abilities. And as for those who mastered three Great Divine Abilities, our sect's history hasn't seen even one. With Sovereign Lin's accomplished Saber Domain, you can protect the Ancient Origin Sect for millennia!"

The Sect Master of the Ancient Origin Sect was very excited. If Lin Fei had just mastered a single Great Divine Ability, even if he defeated the Worry-free Sovereign, the Sect Master would have felt deep-seated worries. The better Lin Fei performed, the more the Sect Master worried, especially about Taiyi Dao Palace.

Taiyi Dao Palace had always had its eyes on the Ancient Origin Sect. They might move against Lin Fei at any moment. And at that time, Lin Fei might be in danger.

However, now that Lin Fei had evolved the Saber Domain, it would be difficult for Taiyi Dao Palace to harm him. In fact, it might be impossible. Once a Martial Sovereign has a domain, not only does their power surge, but their ability to protect themselves also greatly increases. This is even stronger than mastering an "Undying Body" Divine Ability!

"By the way, Sect Master, Wind Sovereign, do you know of any Yin Evil Wind?" Lin Fei suddenly asked, "Or places that have a scene similar to the wind?"

Having evolved his Saber Domain, Lin Fei found it hard to improve it in a short time. Any improvements wouldn't be transformative. The only thing Lin Fei could now cultivate was his Divine Ability. His sole Divine Ability, Black Wind Prison, was nearly unprogressed.

The more profound a Divine Ability, the harder it is to cultivate. Even with Lin Fei's determination, the cultivation of a Divine Ability typically takes years, if not centuries, to show any improvement. Lin Fei didn't want to wait that long. To accelerate his Divine Ability's cultivation, he needed to find a conducive environment or rely on external resources. Black Wind Prison required Yin Evil Wind.

"Yin Evil Wind?" The Wind Sovereign slowly spoke, "I haven't heard of it. I know places with Yin or Evil Qi, but Yin Evil Wind—is it a wind caused by a heavy accumulation of Yin Evil Qi?"

"You know where to find a large concentration of Yin Evil Qi?" Lin Fei asked eagerly.

"It's simple. Mundane battlefields with tens or hundreds of thousands of casualties generate overwhelming evil Qi. Some special places also produce Yin Qi. But if you're talking about places where both Yin and Evil Qi coexist in large quantities, there's only one place."

"Where?" Lin Fei asked eagerly. With Yin Evil Wind, his Divine Ability, Black Wind Prison, could quickly achieve transcendence, or even perfection.

"Corpse Demon Mountain," Wind Sovereign slowly replied, looking directly into Lin Fei's eyes, emphasizing each word with a deep tone.