Chapter 2717: Black crystal!

The lifelessness in the ancient city fluctuated violently.
Ye Chen looked at the obvious increase in death, his expression changed, and he didn't dare to wander outside, and hurriedly hid in the military training hall.
"Roar!"
A huge low roar sounded again, and a terrifying coercion erupted from the ancient city.
At this moment, the entire ancient city was shaking.
Ye Chen felt a strong sense of crisis in his mind, as if something terrifying was about to appear.
"There is still a powerful existence hidden in this ancient city? Is it the Necromancer?"
Ye Chen's face changed slightly, as the divine consciousness spread out, Ye Chen seemed to feel a powerful breath appearing below the ancient city.
This powerful existence seemed to be sealed, but just the escaped breath was powerful enough.
"There is weirdness under this ancient city!"
Ye Chen took a deep breath, a solemn color flashed in his eyes.
Since this ancient city is located in this desert, some creatures are probably actually sealed under this ancient city, most likely to be powerful dead spirits.
Ye Chen had seen it in the desert before, and these dead spirits would melt into the desert before dawn.
I am afraid that there is a lair of the dead below.
Did these Necromancers just call for the powerful existence below this ancient city?
"Is it because I sealed the Necromancer King, which caused these Necromancer Kings to riot?"
Ye Chen was vaguely suspicious.
He killed a lot of dead souls this night, at least there were thousands of dead souls, plus these two dead soul kings, these dead soul king riots are not incomprehensible.
"It seems we can't go out and kill this Necromancer anymore."
Ye Chen showed a wry smile on his face.
"Roar!"
At this moment, the roar below the ancient city became louder and louder, and a strong lifeless spirit rose to the sky, and it had a great posture to lift the ancient city.
Boom!
The walls of the ancient city suddenly lit up with bright luster, and under the impact of this powerful existence, the ancient city was revived!
Strong auras erupted from the ancient city, as if to tear the entire space apart.
Sword lights and fist marks rose to the sky one after another, as if to completely recover.
"Roar!"
A low roar came from below the ancient city, as if colliding with the ancient city.
After a while, this coercion gradually disappeared, as if being suppressed by the ancient town.
Afterwards, the ancient city returned to calm again, as if nothing had happened.
But everyone in the ancient city did not dare to change.
Ye Chen took a deep breath at this time and took out the Dragon Emperor Furnace.
Although the two Necromancer Kings were taken into the Dragon Emperor Furnace by Ye Chen, they did not completely die.
Still retains a trace of consciousness.
The first thing Ye Chen had to do was to refine the two Necromancer Kings.
Otherwise, the Dragon Emperor Furnace may not be able to suppress them for too long.
"Burn!"
Ye Chen moved his mind and directly mobilized the flames of Huo Ling and started to burn the two Necromancer Kings.
The powerful sacred fire burned the dead spirit of the Necromancer King's body, and there was a violent collision in the dragon emperor furnace. The two Necromancers were madly hitting the dragon emperor furnace, wanting to burst out of the furnace.
But under the burning of the divine fire, these two necromantic kings were burnt to fly ash after all!
As the dead spirit dissipated, only two pure soul bodies remained.
Jingle!
With the death of the Necromancer, two black crystals appeared in the Dragon Emperor's furnace. Under the burning of the divine fire, the two black crystals were not damaged in the slightest.
Ye Chen's face changed slightly, and his mind moved, he directly took out the two black crystals from the Dragon Emperor furnace.
"What is this?"
Ye Chen frowned, staring at the black crystal carefully, but didn't discover what material the black crystal was made of.
However, Ye Chen still noticed a strong death aura from the black crystal.
It is like the godhead of the main that Ye Chen obtained before, but slightly different from the godhead, the power in this black crystal is not very strong, not like it is used to enhance strength.
"Since this thing fell from the Necromancer's body, it should have a great effect on the Necromancer, is it the core of the Necromancer's strength?"
Ye Chen carefully looked at the black crystal in his hand, slightly guessing in his heart.
But if you want to verify Ye Chen's idea, you need to do some experiments.
Ye Chen took one of the black crystals and walked out of the restriction carefully.
The undead in the whole street rioted.
At the next moment, countless dead spirits rushed towards Ye Chen, their target pointed at the black crystal in Ye Chen's hand.
Ye Chen's face changed slightly, and he subconsciously returned to the ban.
Bang bang bang!
A crash sounded, and countless dead spirits slammed into the restraint madly, trying to flood Ye Chen, and then beheaded by the restraining force.
Hundreds of dead spirits were banned and killed in one breath.
Ye Chen's expression changed and he hurriedly collected the black crystal into the dragon pattern ring.
Without the aura of the black crystal, these undead spirits stabilized, no longer hit these restrictions, and scattered.
Ye Chen squinted his eyes, a strange color flashed in his eyes.
This black crystal is too attractive for these undead spirits.
If Ye Chen guessed correctly, this black crystal should be the most critical thing for the Necromancer to evolve to the Necromancer King.
Otherwise, these unconscious necromancers would not rush over so brazenly, even suppressing the fear of prohibition.
"But this black crystal only has some effect on the undead, this black crystal seems to have no effect on me."
Ye Chen frowned, his eyes suddenly lit up.
"The four dark demon gods in the Hades Domain seem to be somewhat similar to these dead spirits. Although they were resurrected with the help of Nine Nether Qi, they may also need this black crystal."
A touch of movement flashed in Ye Chen's eyes.
With Ye Chen's current strength, he is no longer too afraid of the powerful strength of this dark demon to seize him.
If this dark devil raised his strength with the help of this black crystal, it would also be a great help for Ye Chen.
Ye Chen's mind moved, and a black halo was released from Ye Chen's body, and the four dark demon gods slowly emerged from the Hades domain.
Ye Chen took out a piece of black crystal from the dragon pattern ring. The next moment, the four dark demon gods all looked at the black crystal in Ye Chen's hand. The breath of the whole body fluctuated violently, and his eyes were full of greed.
Obviously, these four dark demon gods wanted the black crystal in Ye Chen's hand very much.
Ye Chen hesitated, then threw the black crystal to the nearest dark demon.
The dark demon suddenly opened his mouth and swallowed the black crystal into his belly.
As the black crystal was swallowed, the dark demon suddenly trembled violently, and a strong death aura erupted from the dark demon's body.