This is the dark crystal buried in the ground when the demons built the city, this kind of crystal is only available in the demon world, it contains a large number of dark elements, this dark crystal is placed here, it can activate the magic circle in this room, and reinforce the walls of the entire city. ’

"So... Against the sky? Shen Yanxiao's eyes widened, the wisdom of the demon clan was really impressive.

"But I see that the walls have been destroyed a lot before the sun sets, is it true that someone has been shelling here with artillery for hundreds of years?"

'That's from the Protoss' siege weapons. ’

"The siege weapons of the Protoss." Shen Yanxiao was a little fascinated, the Protoss had fallen for a long time, and it was almost impossible for humans to possess the siege weapons of the Protoss, which meant that if she opened this magic circle, then the sun would never set and become a city that never fell in the true sense!

Shen Yanxiao took a deep breath and said, "Can this dark crystal still open the magic circle?" ”

'No, the dark element in it has been depleted. ’

Shen Yanxiao wilted in an instant......

Isn't that funny!

Seeing that she was looking at the first protective shield of the world, but she couldn't activate it, her heart was broken!

But in the next second, Xiu's words made Shen Yanxiao cheer up again.

But you have three plants in your hand to activate it. ’

"Really?" Shen Yanxiao said excitedly.

'Well, otherwise what do you think I'm going to let you come here?' Xiu's voice had an almost imperceptible smile.

"But if you plant three plants here, what will the demons eat?" Shen Yanxiao was a little hesitant, she hadn't decided where to plant the three plants before.

"It doesn't matter, planted here, the circle here will send three plants to grow, and the dark element produced by them will also be spread by the circle to the whole sunset, not only to strengthen the city wall, but also to supply those demons. ’

"Hey, that's so good? That's it! Shen Yanxiao no longer hesitated, and directly took out the three plants from the Na Ring, this basement is very hidden, if it weren't for the cultivation guidance, she wouldn't have found it at all, and it couldn't be safer to plant the three plants here.

These three plants are very important to Shen Yanxiao, not only related to her survival in the barren land, but also related to her future sealing contact.

'After opening the magic circle, the dark element here will be completely activated, the dark element will help the demon evolve, and the characteristics of the demon's body will also intensify the change of the dark element, and then I can restore my strength at a great speed. Xiu explained everything.

But there is one point, Xiu did not say.

That is, once the magic circle is opened, the surging dark element will spread rapidly, and it will soon attract the detection of the demons around the sunset, and those demons who are stimulated by the dark element will enter the sunset in large numbers.

After putting the three plant seeds in place, Shen Yanxiao looked at the dark crystal on the side and asked, "Then how to deal with this?" ”

'Put it here, the dark elemental here will slowly replenish the dark elemental lost by the dark crystal, and you can use it to strengthen other cities when the time comes. ’

Reinforce... Other cities!

Shen Yanxiao blinked her eyes, indeed, as long as she finished building the sunset, she could expand towards the surrounding cities.