The entire underground cavern has now been enlarged several times by the spider-shaped Rose, and the rocks in some places have been squeezed together, becoming a very hard stone, and ordinary weapons can't even leave any traces on it, and the hardness can be said to be comparable to diamond.

This is also the reason why the walls of the cave are full of cracks but do not collapse.

Chen Yue and Christina acted separately and investigated in opposite directions, but after they searched around the entire cave, they still didn't find anything suspicious.

The movement of the battle just now was very large, and this is the hinterland of the undead country, presumably there will be an undead army coming to investigate the situation soon, and there is actually not much time left for Chen Yue and them.

If they don't want to have a relationship with the realm of the dead, then they'd better choose to go back now.

"Master, what should I do?" Christina said with a frown, even her divine sense, which was close to powerful divine power, couldn't sense anything unusual here, let alone the others.

Chen Yue looked at the dark altar where only the foundation remained, if there was really any secret here, then the location of the dark altar was the most suspicious, but whether it was him or Christina, they had checked the dark altar and found something abnormal.

This is an ordinary dark altar, not even fortified, only for some of the most basic rituals.

Suddenly, Chen Yue slapped his head violently, how could he forget the most important item.

Lost Time Compass!

This miracle object that Chen Yue has not figured out since he got his hands on it, one of the effects is that he can explore a certain range of divine objects. The things that can attract the attention of a god like Rose are definitely not mortal things, so the probability of successfully detecting it with the Lost Time Compass is quite large, and if it doesn't work, Chen Yue can only use his archaeology to try his luck.

When Chen Yue took out the misty compass, he immediately noticed something unusual, only to see the pointer on the compass spinning wildly, and then firmly pointed to the location of the dark altar, and never moved again.

"Is it really here?" Chen Yue touched his chin and said.

In order to determine the location more accurately, he also used archaeological exploration tools, and the flashing indicator lights undoubtedly made Chen Yue excited, and the telescope pointed to the same as that of the time compass, all of which happened to be at the location of the dark altar.

When the exploration tool was placed in the middle of the dark altar, the indicator light turned green and was not flashing, indicating that the treasure was directly below, and it was close at hand after a long time.

Chen Yue took out the mining tools for the task reward, and now he understood the use of these tools, which were originally used in this kind of place.

The next step is digging.

Christina also took a shovel and quickly dug into the rock below, digging down more than ten meters in the blink of an eye, but still did not find anything suspicious.

"Keep digging! Even if I dig into the center of the earth, I have to get something out. "Chen Yue is categorical.

Even if the compass is wrong when the miracle is lost, the exploration tools produced by the system will not be wrong, and if they don't dig anything now, it means that they haven't dug deep enough, as long as they continue to dig, something will definitely appear.

Blind digging may make Chen Yue give up, but after having a clear goal, then there is only one way to the end.

Hard work pays off.

When Chen Yue and the others dug a tunnel of thousands of meters, the shovel in their hands finally dug up a hard object, and this thing couldn't dig no matter how they dug it. You must know that the hardness of the shovel produced by the system is comparable to that of an artifact, and even something that can't be dug up with this shovel is at least an artifact-level hardness, which is already a priceless treasure in the eyes of professionals.

"It's huge! It's been dug along the edge for more than 20 meters, and the whole picture hasn't been dug up yet. ”

After Christina finished speaking, she stepped on the unknown object under her feet so hard that she couldn't even leave any traces on it, which showed how hard this thing was.

I continued digging for a few more minutes.

This time, Chen Yue and the others have dug up to a width of 100 meters, and finally dug a different place, where they can continue to dig down, but this is not the end of the object, either continue to dig forward, or change to dig downward, this is a feasible plan.

Chen Yue frowned slightly, pointed ahead and said, "Christina, you continue to dig forward, while I dig down until I reach the border, I want to see how big this thing is!" ”

"Understood!"

Christina raised her shovel and they went their separate ways.

After digging down for a certain distance, Chen Yue encountered a hard object again, and from the perspective of material, it was consistent with what he dug at the beginning, which means that the two sides are likely to be actually the same thing, but the middle is hollowed out.

"It's hot!"

Chen Yue suddenly shouted, and then shook off the time compass in his hand, this thing now exudes a very hot temperature, and even burned Chen Yue, who can bathe in magma, which shows how high the temperature is above.

"What's going on? Why did the compass suddenly become hot when it was confused? ”

Chen Yue covered his palm with cold ice, picked up the misty compass that was melting the rocks, and wondered, "Could it be that the artifact is nearby?" That's why the compass became so hot. ”

"The hosts! What's wrong with you? ”

Christina heard Chen Yue's shouting, and thought that the other party was in some trouble, so she hurried along the excavated tunnel.

Chen Yue stretched out his palm and smiled slightly: "You can touch the compass and you will understand." ”

"It's so hot!"

Christina shouted, and at this time she understood why Chen Yue suddenly screamed, the current temperature of the compass can melt steel, and maybe even turn steel directly into iron steam.

The pointer on the compass had now turned fiery red, pointing to the left of Chen Yue, the place where they had first excavated, just separated by an object of unknown material.

And as he got closer and closer to the goal, the temperature of the misty compass became higher and higher, and in the end, Chen Yue couldn't even hold it anymore, so he could only use the sword of the fallen prince to move forward.

This also made Chen Yue experience the feeling of pain for the first time, after coming to the other world, all the enemies combined, not as much as the damage caused to him by the time compass.

If it is converted to the level of equipment in the game, the compass is properly equipped with full-level equipment, otherwise it will not hurt Chen Yue, which has to make people sigh, the professionals in the other world are working hard, and their strength is not as good as a compass, which can be described as quite desperate.