The wind was whistling in his ears, and Su Yu chose a direction to take the road and escape, but the direction was not to choose the direction of returning to the Great Wall of Hope.

Originally, Su Yu wanted to follow the agreement with Lao Wu and a few people, and now he went to the territory of the Terran Race of the Great Wall.

However, on second thought, fleeing in the direction of the Terran territory is not necessarily the most correct choice.

The most dangerous place may be the safest, and for Su Yu, the demon city is the most dangerous place, but because of this, the demon is likely to ignore this, ignoring that Su Yu will hide near their city.

The direction in which Su Yu is now moving is a city of the demon clan, of course, Su Yu chose this way, in addition to the above reasons, he is also a little unwilling, can the ore veins under the demon city really not be detonated?

Su Yu wanted to give it a try, but it was impossible for others, but it was not necessarily for him.

The reason why the veins and leylines under the city cannot be destroyed is because they are well protected by the source array, and it is difficult for outsiders to enter them, and they will not even be discovered before they get close.

But don't forget that Su Yu is open, and the source array is likely to be unsolvable for others, but for him with extraction skills, it may not be a difficult problem to solve.

When he was in the Dongshan Realm, when he encountered the veteran killer, he was trapped by the source array, but under the extraction skill, he directly opened a hole in the source array, and then he ran away.

Therefore, Su Yu wondered if he could also open a hole in the source array that protected the source energy stone veins.

Su Yu was ready to try, so Su Yu stared at a demon city and passed, according to the judgment of the geographical location and the distance from the Great Wall of Hope of the Terrans, Su Yu judged that this demon city was called Black Iron City, and it was a demon city dominated by the Black Iron Demon Clan.

Looking at it from a distance, Su Yu just inhaled a cool breath, this demon city is very large, not much smaller than the human city-level city, and the number of demons in it is at least hundreds of millions.

The architecture of the demons is not exquisite, but it is not bad, the demons like black, so most of the demons' cities are built of a hard black stone.

The same is true of the black iron city in front of him, which looks like a huge black beast crawling on the ground from a distance.

"It seems that we still have to make a hole!" Su Yu muttered to himself, and then found a hidden place to start making a hole, heading in the direction of Black Iron City.

In case of being discovered, Su Yu played the hole very slowly, and it was very deep, it took Su Yu three days, Su Yu was close to the Black Iron City, and Su Yu did not stop except for some unnecessary rest in the three days.

Underground, Su Yu took a deep breath and said, "It's the last fifty meters, take a break, and then act!"

At this moment, Su Yu's spirit and demon skills were open, so in Su Yu's eyes, the scenery seen underground was different, fifty meters away from him, a huge light curtain appeared, it was a huge source array light curtain, and the huge source array light curtain was like a huge eggshell that kept the underground ore veins and leylines in it.

If you want to get in touch with the ore vein or the leyline, the only way to break or crack that layer of source array light curtain is to break or crack it, Su Yu doesn't know if he can open a hole in it to get out, before taking action, Su Yu has to adjust it.

Su Yu opened the character panel:

Name: Su Yu

Physical Realm: Immortal Blood (Iron Blood) (0100000) [Cultivation Method: Su Yu Skips]

Spirit: Immortal God (4000)

Combat power: 5000 jun

Essence: 4300000000 points

Status: 0 points (0 is the best in the body, negative numbers indicate negative states such as injuries and detachments, and + points can be used to recover when the numbers are negative)

Mastery: 93%

Skill 1:

Extraction level 6 (0100000) (can be added, enhance the intensity and scope of extraction, greatly improve the extraction efficiency, and take the host as the center, form an extraction force field with a radius of 40 meters, within the force field range, the essence point can be extracted without the host touching the item.) Note: The effect is better when you don't wear clothes!)

Skill 2:

Spirit Eye Level 5 (01000000) (can be added to enhance the power of the Spirit Eye, the current level is level 3, you can see through the weaknesses of all creatures below three grades higher than the host, and you can further expand the range to observe the direction of the leylines and the direction of the flow of source energy.) Consumes 100 Essence Points per second, i.e. 100 Essence Points per second. ）

Skill 3:

Vientiane space 3 cubic meters (1 cubic meter 100,000 essence points, infinitely expandable, can hold living things)

Skill 4:

Burst Punch: Amplitude 000% (Increases the limit of mastery by burning essence points, increasing mastery by one percentage point for every 1000 essence points burned.) ）

In addition to making holes in the past few days, Su Yu has not been idle, and has extracted all the things that can be extracted into essence points, and the total essence points have reached 430 million.

"Why don't you upgrade a level first?" Su Yu looked at the character panel and touched his chin and said, since the last upgrade, Su Yu has experienced a lot of battles, and he has already broken the limit and can be upgraded again.

However, he has been fighting with the demons, so he doesn't have much time for Su Yu to upgrade quietly.

Now nearly a hundred meters deep underground, it can be said that it is very quiet, it is a good place to upgrade, and there are so many essence points that Su Yu feels uncomfortable, Su Yu is actually not a person who can save money, he wants to spend it if he has money.

And the upgrade is not useless, the cultivation has been improved, not to mention anything else, the speed of punching the hole will definitely be faster!

Of course, Su Yu was a little hesitant, not hesitating whether to upgrade or not, but hesitating whether he would improve his cultivation first or improve his skill level first, and after thinking about it, Su Yu still chose to improve his cultivation first.

With a decision, Su Yu instantly burned a hundred million essence points, and began to improve his cultivation, and Su Yu's cultivation began to be promoted from the fourth rank to the fifth grade.

Su Yu's blood burned, four to five grades, it was the process of refining blood, and the moment it was upgraded, the blood in Su Yu's whole body boiled like boiling water.

This upgrade process is relatively uncomfortable, every time it is promoted across the major grades, it is extremely uncomfortable, Su Yu endured the pain for a whole day, this upgrade is completed, and the cultivation is promoted from the immortal bone to the realm of immortal blood, that is, the realm of the fourth grade to the fifth grade.

At this point, Su Yu's qi and blood power can be regarded as a metamorphosis, bursting out with the same combat power, but the damage that can be caused is greater, and the qi and blood are more condensed!

"Whew, it's time to start acting!" Su Yu opened his eyes, his state had reached the best, and the fifty-meter block was driven by the power of Su Yu's five pins' qi and blood, and a few breaths were broken, and the source array that radiated light appeared in front of him, and at the same time, the source array had already come into contact with Su Yu's extraction field!