The Spirit Academy clearly delineated the timeline.

In the first year of Late Taichu, the spiritual energy of Blue Star began to deplete. Humans did not notice it at first until the Demon Race started to evolve.

Thirty years later, war finally broke out between the Human Race and the Demon Race.

Initially, the Human Race suppressed the Demon Race, almost undefeated.

It wasn't until the 50th year that a Demon King rose, and humanity finally realized the crisis.

From the 50th to the 100th year, it was an era of parity between humans and demons.

After the 101st year of Late Taichu, the situation changed. The Demon Race countered and pressured the Human Race, initiating the darkest fifty years for humanity.

In those fifty years, the Human Race was extremely miserable, yet it was from this period of darkness that humans began to explore a new method.

That was to abandon the cultivation of spiritual energy and switch to the method of Beast Taming.

Initially, many people opposed it, believing it to be a wrong path.

However, as the spiritual energy of Blue Star weakened, humans were left with no choice but to follow this path.

And those who had been practicing Beast Taming from the start began to shine at this moment.

Thus began the third war between the Human Race and the Demon Race.

This war lasted the longest and had the most casualties. Due to the slow start of humanity, they ultimately fell behind, leading to the Cangling Ancient Country's ancestors facing defeat, resulting in the Battle of Ling Mountain.

The Battle of Ling Mountain was divided into three parts:

First Stage: Breaking Free.

Second Stage: Turning the Tables.

Third Stage: Counterattack.

The Battle of Ling Mountain was the most difficult and dangerous, but not defined here as the highest level of difficulty.

The War Chessboard has four types:

Ordinary Level, Hard Level, Hell Level, and one more:

Deadlock.

The Battle of Ling Mountain is considered a hard situation because the ancestors have already paved the correct path. Therefore, if students wish to enter here, they only need to engage in combat and hone the battle techniques of Spirit Beasts.

As for the deadlock, it has yet to be solved.

For example:

The Battle of Cang Mountain.

Cang Mountain was the original stronghold of the Human Race's great army, which was later besieged by Demon Beasts, resulting in heavy casualties. Under the proposal of the First National Preceptor, they retreated to Ling Mountain.

Today, the Battle of Cang Mountain remains a deadlock.

Besides, deadlocks are not uncommon. Over the years, many have been solved, leaving only about seven or eight still unsolved.

"Which one do you want to try?" Ding Feng asked.

"Let's try a Hell Level one." Lin Chen thought for a moment and said, "The Battle of Ling Mountain, Breaking Free."

"Breaking Free is not quite suitable for you right now..." Ding Feng said, "Our real-world strength will be fully projected onto the real battlefield. If your strength is too low for this battlefield, it might be over before you truly experience it."

"The Battlefield Chessboard is very beneficial for the enhancement of spiritual power cultivation and combat techniques. I suggest you start with simpler battles, given that you can only use this war chessboard once every three months."

Lin Chen was very certain as he said, "It is said that the First National Preceptor Gu Wei, in order to Break Free, tested the Demon Army thrice, ascended Cang Mountain, and crossed ninety thousand kilometers to reach Ling Mountain, safeguarding the last spark of humanity."

"As a student, I've always admired him and longed to meet him at least once."

Ding Feng was very appreciative upon hearing this and said, "Now that we are moving towards peace, many people begin to forget the brutality of war and even more so the greatness of the predecessors. It's very commendable that you think this way."

"Since your mind is made up, go and give it a try."

Lin Chen cupped his hands.

Then Ding Feng led him into a room, where Lin Chen saw leaves everywhere above, confirming his suspicions.

Indeed, there was a World Tree in the Spirit Academy.

"Just sit there." Ding Feng instructed a few things and then turned to leave.

Once the door closed, Lin Chen began to feel drowsy.

....

"We mustn't admit defeat until the very end!"

"Ling Mountain is our only hope."

Before Lin Chen could open his eyes, he heard people talking, and then, following a loud table-slapping sound, arguments began.

"Gu Wei, exactly who is the Commander-in-Chief, you or I? You're only Level 40; what right do you have to speak here?"

"If everyone present believes that leading troops into battle relies solely on strength, then I, Gu Wei, have nothing to say."

Lin Chen finally saw Gu Wei's appearance. He looked unremarkable and was accompanied by a Level 55 Spiritual Insect, which was the Spirit Beast that evolved into a Spirit Dragon.

It was from that time that the Spirit Dragon became the symbol of the National Preceptor of the Cangling Ancient Country.

Lin Chen knew that the plot had begun.

This was the beginning of a power struggle.

Establishing the chief commander in military affairs is crucial.

The current backdrop is that the Human Race is in the darkest period of history, having just suffered a major defeat at Cang Mountain five thousand kilometers away.

This place, named Wushan, has fifty thousand soldiers of the Human Race trapped here, later known as the Founding Ancestors Army.

The man opposing Gu Wei is named Ma Xin, Level 75, with his strongest Spirit Beast at Level 85.

Ma Xin was initially the Commander-in-Chief of this Founding Ancestors Army.

They are now surrounded by five hundred thousand Demon Beast troops, unable to escape.

Thus, Ma Xin has entertained thoughts of surrender.

In fact, Ma Xin is not a coward.

"I am not surrendering, but pretending to surrender, waiting for an opportunity to counterattack. I can tell the difference between fearing death and throwing away lives. Those brothers outside are brought out by me; I won't watch them die in vain." Ma Xin spoke earnestly.

Yet Gu Wei directly retorted:

"Foolish beyond measure!"

"Say that again?" Ma Xin was furious.

Gu Wei pointed to the sky, trembling as he spoke:

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