The location of the first royal city is near the boundary between the regional continent and the heavenly continent. Close to Jiding Tianshan.

Using the teleportation array, it only takes seven days to catch up.

After they actually arrived, they discovered the seriousness of the problem.

That area is the battlefield of the abyss and the second-level main city of Bator. If you approach rashly, you will face the threat of the abyss.

The two did not have the strength to cross the battlefield, so they could only find another way.

While the two were thinking, Shika accidentally discovered a cave. She said that she felt the same kind of breath in the cave.

Later, Irving also affirmed this.

The two little guys confirmed together that it was already certain that there were elemental spirits in the cave. However, Yu Tu is not sure whether these elemental spirits can be touched.

Before, there was an example of a fire elves born in the blood of the gods. In this land occupied by the abyss, it seems that the appearance of abyssal elemental spirits is not incomprehensible.

If it was before, Yu Tu hopes to stay away from this unknown. After all, it is unnecessary. But now, he needs experience, battle, and people.

Yu Mu raised no objection to Yu Tu's choice. For him, after waiting so long, it doesn't matter how long you wait.

When she found the entrance to the cave, Yu Tu frowned.

The cave entrance is not small, but it is not so easy to find. A large number of roots entangled on the rock wall of the cave. From the outside, it looked like the root of a tree.

These roots are very strong. The thinnest is the thickness of an adult's wrist. Intertwined, but can clearly distinguish their differences.

Yu Mu observed carefully for a while and said: "Charm magic. Special magic power fluctuations. These plants have problems. Moreover, if there is no error in the analysis, these trees are the same materials that made me."

"Are you sure?"

"sure."

This made Yu Tu heightened his vigilance. To be honest, Yu Mu has updated several times now, but the core part of the body has not changed, the reason is that there is no alternative material.

The most powerful thing about Yumu is that he can control the flame of the sun god. The kind of flame that can burn everything is itself a double-edged sword when used. In the first Yumu, after each use, the arm will suffer certain injuries, and it will take time to repair it slowly.

But now, Yu Mu didn't dare to use the sun **** flame to wrap himself around. Doing that will melt your arm first.

That is, this kind of tree can resist the burning of the sun **** flame. This is not a simple tree to explain.

Yu Tu thought for a while, drew out a dagger, picked a thinner one, and slashed it down.

With the sword up and down, the trees were cut off without the slightest resistance. Both Yu Tu and Yu Mu were silent.

"Are you sure now?"

"I can be sure that this is the material from which I was made."

"The hardness is not enough. Is it because it is not the backbone?"

While talking, Yu Tu cut off a few pieces and held them in his hand to check.

The cut-off location leaked a liquid like pure water, but with a special smell. In Yu Tu's mind, the best match was the smell of formalin.

The liquid of a tree will be formalin, which is unbelievable.

After that, Yu Tu noticed the real peculiarities of the trees in his hands. He originally wanted to cut off the bark and make sure there was no special part inside. But the sharp dagger before falling on the branch made the sound of metal collision. Both of them clearly saw the splashing sparks.

The nature of the trees has changed. At least, the current tree has a hardness that is not inferior to metal.

Yu Tu narrowed his eyes and handed the dagger to Yu Mu. Yu Mu also understood Yu Tu's meaning, took the dagger, and cut off the part that Yu Tu had cut before.

The same hand up and down the knife. The same, after being separated from the main body, it becomes as hard as metal.

Yu Mu tried to use solar flames to burn, but the branches persisted for a few seconds before they were burnt. And changing to the flame of Aiwen, it just persisted for a while.

This made the two of them puzzled.

"Try others. It may be an example."

After many experiments, they have to admit that this plant is too magical.

The trees themselves are no different from conventional plants. After being separated from the main body, it will begin to transform in a certain direction. It seems to have something to do with being out of touch.

If this characteristic finds a pattern, it seems that the cut trees have the ability to resist the flame of the sun god. However, this characteristic is single. Fire resistance means that there is no hardness. A material like Yumu that has both hardness, flexibility, and magical path that can resist the power of the gods, I don’t know how much effort it takes to make it.

However, it is now certain that there is an inseparable connection between this and Wusenia. It may be one of the main reasons why Saslow could not complete the technology without Senia.

You must know that the new puppet troops that were made with the help of Yumu's technology have not yet given birth to a warrior with a truly complete soul like Yumu. After deduction, they need at least thousands of battles to achieve their goals.

"Let’s go, maybe the elemental elves inside can know something. This kind of tree should be unique here. Maybe there will be a way to the Ruins of Wu Senia. At least, it seems that this number is A tree that grows backwards."

Yu Mu nodded and took the lead into the depths of the passage.

The cave is very complicated, like a three-dimensional maze. But every place is covered by plant roots. These roots are also very strange, only a shallow layer is buried in the rock wall, not rooted in.

At the same time, in the cave, they also encountered a strange creature.

It looks very similar to a ghoul. The size of a child, pale skin, slender body, and mobile limbs, can use the special environment to attack from various positions. He obviously lives underground, but he has a pair of **** eyes, and he looks like an alien in a fantasy.

These monsters have a strong desire to attack, but their strength is not strong.

In Yu Tu's perception, he could see that they would take away his companion's body. Not to cherish companions, but to eat.

There are still many such creatures. When you get to the depths, you can meet a group by just two steps. But the strength is really not enough to see.

It should be the bottom of the food chain in this underground environment.

That's right, the underground world.

Yu Tu and they have seen the elemental spirits. And what appeared before them was an underground kingdom supported by trees.