With Mu Hanyan with her, this matter suddenly became simpler, as a top archaeologist who has been exploring abroad all the year round, she took care of all the work for Xu Yao and the two of them this time.

And this other person is not Lin Bingru, but Donna.

Originally, Xu Yao wanted Lin Bingru to come with him, after all, he and Lin Bingru had cooperated for so long, and they also had a tacit understanding.

In particular, the combination of Frost Nova and Ice Blast, as long as you don't encounter epic enemies, is invincible.

But this time Lin Bingru declined Xu Yao's invitation, because she was going to retreat and cultivate for a period of time, and in the process of destroying the portal last time, Lin Bingru saw Xu Yao's true strength, which made Lin Bingru feel a little uneasy.

She was afraid that she would be pulled too far away by Xu Yao, and then the two would be unable to continue to cooperate because of the big gap in strength.

As for Donna, she doesn't have this psychological burden, and she also knows that it is impossible for her to catch up with top geniuses like Xu Yao and Lin Bingru, so she just hugs her junior's thigh and lies down by herself.

This is not the younger brother invited himself to explore the ruins, and the master led the team, if he finds anything good during this period, he must not have his own share.

"Master, junior brother, let's eat." In terms of cultivation, Donna chose to lie down, but in taking care of her master and juniors, Donna took out all her energy, which was the only skill she could handle.

Therefore, although they were on the trip, the quality of Xu Yao and Xiao Lori's diet and daily life did not decrease much.

"We'll be there in about half a day." Little Lori licked the dessert after the meal and looked at a map spread out in front of her.

This map is not the usual one on the market, but a special map made by the royal family, which contains a lot of information that is not found in ordinary maps, including a red marker on this map, which is where the Heart of Fire was found.

There are patches of black mountains, and the reason why they are black mountains is because the rocks of the mountains are extremely hard black stones, and the stones are so hard that the grass and trees cannot take root on them.

Without the vegetation cover, the color of the mountain range took on the color of black, hence the name of the black mountain.

Because of the special nature of this place, there are many people who come to explore the Black Mountains, but there is almost nothing of value here, except for the hard black stone, which is hard but very brittle.

This frustrated many people's desire to use these black rocks to build weapons, and gradually no one came to this black mountain range.

However, after all, this black mountain range is in the territory of Dongli Country, so Dongli Country still sent people to garrison here.

The Heart of Fire had been found by the warrior stationed here, but that was many years ago, and that warrior was now the commander of the Praetorian Guard.

The Black Mountains are still guarded by Praetorian Guards, and every day the Praetorian Guards patrol the Black Mountains, and it is clear that the royal family also hopes to find another treasure of the Heart of Fire here.

This time, Xu Yao and the others entered the Black Mountain Range, and with the permission given by the King of Dongli, they could command the Praetorian Guards stationed here to let them help, and the Praetorian Guard soldiers here patrol here all year round, and they are very familiar with everything here.

With their assistance, you can definitely save a lot of trouble, and then, Mu Hanyan, a top archaeologist, will find the hidden ruins.

Half a day later, Xu Yao and the three of them arrived at a military station, which was also the entrance to the Black Mountain Range.

"Three adults, please inside!"

The guards at the military station obviously received the news very early, and when they saw Xu Yao and the three of them appear, they hurriedly greeted them and respectfully welcomed the three of them in.

"The three adults, these are veterans who have been stationed here for decades, they are extremely familiar with the Black Mountains, and they will be the guides for the three adults at that time."

After Xu Yao and the three entered the station, the person in charge of the station immediately brought a few veterans over.

"It's hard work!"

Xu Yao nodded, in front of outsiders, it is usually Xu Yao who comes forward, after all, Mu Hanyan's appearance of the little Lori is indeed not too convenient.

Instead of choosing to set off immediately, Xu Yao first asked a few veterans some questions, such as whether there was anything special about the Black Mountain Range.

That way, they can go to those places first, which will be more efficient than searching aimlessly.

"My lord, it's ...... here"

Hearing Xu Yao's inquiry, those veterans did not hide it, and told everything they knew, among which the few special places they pointed out were actually very close to the place where the Heart of the Fire Demon was discovered.

"Guys, let's go now." Now that he has made a discovery, Xu Yao doesn't want to wait any longer, and is ready to go over and explore it directly.

Although the sky has darkened now, since it is the request of the big man from above, several veterans will not refuse, unlike other mountain ranges, there will be no danger in the black mountain range at night.

There was nothing but black stones in the black mountains, no plants, no monsters.

So, the group arrived at their destination very smoothly, on the highest peak of the Black Mountains, which is also the highest point of the Black Mountains.

"Once upon a time, this mountain was supposed to be a volcano." Mu Hanyan stood on the top of the mountain and saw the origin of the mountain at a glance. "Since it's a volcano, there should be a cave in the mountain, let's see if we can get inside."

With Mu Hanyan's words, Xu Yao and Donna began to look around, and the few veterans who led the way before were guarding at the bottom of the mountain.

Their strength is average, and it is impossible for them to keep up with the footsteps of the three of them in mountaineering, after all, even Donna has a 4-star cultivation at the moment, and mountaineering is almost the same as walking flat for them.

"There's a cave here!"

After a while, Donna's voice came, and when she heard this, Mu Hanyan and Xu Yao quickly arrived, and sure enough, they saw a small hole about half a meter in diameter.

"I'll go in first."

Mu Hanyan stopped Xu Yao, who was about to enter, and went into the cave first, and after a while, Mu Hanyan returned and beckoned the two to go down together.

During this period, Donna was stuck several times, but there was no way that the size of the cave was not all the same, but there were ups and downs, and the ups and downs on Donna's body were also relatively large, so it was inevitable to be stuck.

Fortunately, the ups and downs on Donna's body are elastic, and she can squeeze hard to get through.

"Whew~~"

As she got out of the small cave, Donna clutched her chest and let out a long breath. At the same time, the scene inside the mountain is also imprinted.

There are no surprises, no surprises, the interior of the mountain is still black rocks, and these black rocks have built up a series of interconnected caves.

At this moment, the three of them were only in one of the very inconspicuous caves.