"It turns out that there are so many cultures in the Douluo Continent, and my friends and I are stunned." Tang Le slowly closed the heavy book in his hand and said with a look of amazement.

He had been in the Royal Library for a full afternoon, and he had a little understanding of the Douluo Continent and culture, whether it was medicine or other aspects of life. The fly in the ointment was that he had flipped through many history books, but he had not found any records about the Blue Silver Grass Soul Master.

There was nothing else on those books except the waste blue silver grass and the world's recognized waste martial soul blue silver grass, which made Tang Le very sad, it turned out that his own martial soul was a waste since ancient times. If Tang San was here, maybe the two brothers would be able to hug their heads and cry for a while. But then again, he didn't notify Tang San when he came to Heaven Dou City, I'm afraid he was already in a hurry, right?

Tang Le shook his head, at this time, the sky outside had completely darkened, and the entire Heaven Dou City was completely quiet, except for the occasional dog chirping, there was nothing else.

"It's time to go back, too." Tang Le thought about it, according to Xue Qinghe, his room was near the Royal Library.

He slowly stood up and walked straight to the library door, ready to return to his bedroom to rest.

As he was walking forward, Tang Le suddenly felt as if he had tripped over something, and his whole body lost his balance.

In a panic, he subconsciously put his hand on the wall to keep his balance, but the moment his right hand touched the wall, the golden wall collapsed entirely, and there was a "squeak" sound.

"What's going on?" Tang Le stabilized his figure and asked suspiciously. But before he could react, the entire library trembled violently. The tiles under Tang Le's feet continued to crack, and the entire floor collapsed, and a staircase appeared in front of him, leading to a dark and bottomless cave.

"This ......" Tang Le was speechless in surprise, could it be that he pressed some mechanism? Looking at the pitch-black cave, Tang Le couldn't help but have a trace of curiosity in his heart, what was it that was set up so secretly? To put the mechanism in a royal library that few people come to must be some big secret.

Tang Le's legs slowly stepped onto the stairs leading to the ground, carefully observing the black cave.

The cave is very old, and the walls of the cave have a lot of moss, and according to the information from the rocks, it can be judged that it was formed at least thousands of years ago. The cave is by no means a natural formation, and their walls are carved out of stones of a particular character, each 2.5 meters long, 3 meters high, and weighing at least 2.5 tons. And to create such a person, a continuous cavern, the amount of work in it is incalculable.

Continuing to walk forward, Tang Le saw an even more terrifying scene. Bones were scattered on the ground, and blades were scattered around them. The facial expressions of those white bones were undoubtedly hideous, although there was no skin on those bones, Tang Le could still judge it based on their actions before they died. The bones were separated one by one, their heads were cut off before they died, and several sharp swords pierced the top of their heads, so that they were dead before they could react.

There are still such things in the Heaven Dou Palace in Heaven Dou City, what the hell are these? Looking at the white bones in front of him, Tang Le's heart was both confused and afraid. The corpses of these men were at least thousands of years old, but their bones did not disappear inside the cave, but remained here forever. Could it be that the Heaven Dou Empire still has some ulterior secrets?

With curiosity, Tang Le continued to explore. After groping through the rugged paths, Tang Le was blocked by a huge guy.

It's a monster, or maybe it's like a soul beast in the book. He had two huge horns on the top of his head, and his whole body was furry, obscuring its outer skin. Its limbs were covered with claws up to two meters long, and its two eyes were round, and red blood seemed to be still flowing inside.

And it has dozens of sharp swords stuck in the top of its head, and it has more or less staggering wounds all over its body. Beside him were hundreds of corpses, presumably killed by the monster.

"Is this a soul beast?" Tang Le looked at the soul beast in front of him that was dozens of meters high and let out an exclamatory sound. He couldn't tell how old the soul beast in front of him was, but based on its huge appearance, it must have been thousands of years.

Bypassing the huge corpse, Tang Le continued to walk forward.

What appeared in front of him was a large underground clearing, or an underground graveyard. The corpses of thousands of soul beasts all fell to the ground, and tens of thousands of human bones remained not far from their corpses.

Tang Le stared blankly at the scene in front of him, although thousands of years had passed, the scene in front of him seemed to appear in his eyes. Tens of thousands of human soldiers lined up to attack these giant soul beasts, and the angry soul beasts seemed to be holding their last retreat, rushing forward one by one without fear of death, even in the face of the orderly attack of humans, they suffered heavy losses, but they followed one after another, and the bones on the battlefield continued to pile up, becoming the appearance in front of them now.

The sound of trumpets and fighting in the past still seems to be echoing in my ears, is this the invasion of humans or the attack of soul beasts? This group of doubts gathered in the Tang Le Center, as far as he knew, this battle was not recorded in the history books of the Heaven Dou Empire at all, was it deliberately concealed, or did humans not know at all?

Taking a deep breath, Tang Le adjusted his mentality, and stepped through this battlefield of the past with heavy steps. In this vast expanse of space, bones are buried everywhere. The boulders and the corpses of soul beasts in the distance were intertwined, and the corpses of humans were stacked like pyramids, a dark and desolate scene. The cold wind howled, the sun was dark, the flying canopy was broken, the weeds withered, and the cold wind was like a frosty winter morning.

After half an hour of walking, Tang Le finally walked out of this terrifying ancient battlefield. Arrived in a new giant cavern.

There were fewer corpses in the vicinity of the cave, perhaps because after the battle, both sides were much less manned, or some other reason.

In the deepest part of the cavern, there was a faint glimmer of golden light, which was extremely dazzling in this dark cavern.

What's that, exactly?

Tang Le's heart was full of doubts, and some kind of subconscious told him that all that was ahead was to unlock the key to this unknown war.

Continuing to walk forward, Tang Le's eyes couldn't help but widen, his whole body trembled, sweat the size of beans flowed from the top of his head, and a cool breeze blew behind him, making him tremble.

The scene in front of me is really amazing......