The reason why Zhang Yu did this was firstly for the mission, and secondly, to kill the ghost mother, and he would not be able to escape once the Black Castle fell. Even if he escapes, he will face endless pursuit in the ghost domain.

Now it seems that the Ghost Mother attacked the Black Keep on her own, indicating that he had no way to contact the outside world. Of course, this is just Zhang Yu's speculation, anyway, the risk is worth it.

Zhao Xiao also understood, he looked at Ouyang Mu, only to see Ouyang Mu nodding slightly. At this moment, a large number of disciples in the foundation building period arrived, and Zhao Xiao already had an idea in his heart.

"The monitor lizard is coming, we must take the initiative!" Zhao Xiao said loudly, Zhang Yu breathed a sigh of relief, fortunately Zhao Xiao agreed with his plan. The other disciples have no objections, whether they are alive or dead, the human domain and the ghost domain have always sworn to be incompatible, except for a few people, such as Meng Tiandong who is willing to fly and dog, everyone else will choose to fight.

Zhao Xiao originally wanted Zhang Yu to lead these people, but thinking that Zhang Yu was not familiar with these disciples, he finally asked his cronies Zeng An to lead the team, Zeng An was more familiar with Zhang Yu, and he was rescued by Zhang Yu, so there was no problem with cooperation.

The other disciples had no problem, they all said that they would listen to Zeng An, and soon an elite team was formed, waiting to be put into the battlefield at a critical moment.

Flames flashed in the huge cavern, countless rain of fire burned the rats outside, and occasionally a few climbed up the outer wall and were killed in an instant, all the flaming crossbows were ready, and they were all aimed at the direction of the monitor lizards.

"Ready, go!" The monitor lizards seemed to move slowly, but they were actually fast. After a while, the group of monitor lizards reached the range of the Flame Crossbow, and the inner disciple in command roared loudly.

More than a dozen flame crossbows made a deafening sound, and more than a dozen flames flew into the sky, instantly entering the group of monitor lizards.

"Boom, boom!" An explosion sounded, and one of the unlucky monitor lizards was stuck in the head and died on the spot, while the rest continued to move forward despite the explosion.

Zhang Yu looked at the battlefield tightly and found that the effect of the flame crossbow was not very good. The second batch of flame crossbows was fired again, and to the surprise of those monitor lizards actually swam from side to side, the effect of the flame crossbows dropped to the extreme, and most of them fell to the battlefield and exploded, and those explosions did no harm to the monitor lizards with thick skin.

"Wait to get closer before launching!" Seeing this situation, Zhao Xiao frowned and gave an order.

Without the harassment of the flaming crossbows, the monitor lizards sped up.

The monitor lizard stretched out its four legs, trampled the thick corpse into a pulp, and from time to time it also stuck out its tongue and rolled the mouse running next to it into its mouth, and the outer disciples on the city wall saw this situation, and their legs trembled with fear.

Seeing the monitor lizards getting closer and closer, the flaming crossbows were once again powerful, and the monitor lizards were killed by the arrows and pinned to the ground.

Seeing the monitor lizard being nailed, everyone on the outer wall cheered, but at this moment, the corners of the ghost mother's mouth in the distance turned up slightly, and suddenly a monitor lizard jumped up, stepped on the back of another monitor lizard, and suddenly jumped.

"Kill them!" Zhao Xiao shouted in surprise, the leaping lizard attracting everyone's attention.

But what no one saw was that a monitor lizard was lying on the ground and cautiously moving forward, crawling under the wall, its stomach cracked, and a hand stretched out.

When Zhang Yu saw this scene, he always felt that something was wrong there, because under the defense of dense crossbow arrows, those monitor lizards that showed their soft bellies were hit and died. It's too easy, Zhang Yu frowned, he switched the eyes of the ghosts and gods to look around, and unexpectedly saw a large black figure appear under the city wall.

"Damn, there's a conspiracy! Hurry!" Zhang Yu shouted loudly, and without thinking about explanation, he suddenly rose into the air, drew out the Nine Heavens Xuan Sword and rushed towards the outer wall.

Zhao Xiao and the others were startled at first, and when they saw a large number of heads emerging from the outer wall, they didn't care about scolding, and the group of elite disciples flew down.

This group of people was none other than the group of puppet disciples who had been left outside, who had been stuffed into the belly of a monitor lizard by the ghost mother and attacked the outer city wall by surprise.

"Aren't you Liu Chun? Why ......" A disciple saw a familiar face and subconsciously greeted him, but unfortunately the familiar person was only a shell left, he rushed over and stabbed the unsuspecting outer disciple with a knife.

The outer disciple's eyes widened, and he looked at the puppet disciple in disbelief, and fell to the ground, not staring.

Almost instantly, the outer wall was full of shouts of killing, and under one look, more than a dozen outer disciples died, and several flame crossbows were unusable. The city's fire power was greatly reduced, and several monitor lizards also took the opportunity to rush in, and for a while, the perimeter of Blackcastle was in danger.

"Go up, go up!" the inner disciple shouted, the spell in his hand took shape, and in an instant, the wind blade flew out and cut the head of a monitor lizard in half, and before he could be happy, he was caught by his long tongue and disappeared into his big mouth.

An outer disciple was forced into a corner by a puppet, and he was about to be killed, and the outer disciple closed his eyes and waited for death.

At this moment, the streamer flashed, and the puppet instantly turned into two halves, and a stream of black gas came out and disappeared into the air like a fire. At the critical juncture, Zhang Yu killed first, and wherever he went, he either stabbed or used talismans, and those puppet disciples suffered heavy casualties.

"Zhang Yu, you're finally here!" the ghost mother felt something, his eyes lit up, and he disappeared in place in an instant.

Killing a monitor lizard again, Zhang Yu also felt that he was being locked up, and suddenly felt his scalp tingle, and flew away from here without thinking about it.

At the moment when Zhang Yu flew away, a black gas appeared instantly, and the remaining momentum pounced on the outer wall, just hitting a monitor lizard, the monitor lizard was instantly shrouded in black gas, and when the black gas dissipated, what made Zhang Yu's scalp tingle was that the monitor lizard was corroded into two sections, and the middle body part disappeared without a trace.

"Ghost Mother, you still dare to come!" Zhang Yu roared, casually reminding Zhao Xiao to pay attention and implement the plan.

"Today is your time of death!" the ghost mother appeared not far away, and suddenly it was the appearance of Zhang Xuan.

"Ma Dan, all evacuate to the inner city!" Zhao Xiao couldn't help but hate when he saw this plot, he still carried out the plan rationally, shouting and retreating, fortunately, the group of elite disciples blocked the puppet's attack, and most of the outer disciples retreated to the inner city.

"The general of the defeated army, how can you speak bravely! I am too lazy to fight you. Zhang Yu said with a sneer, turning around to leave.

"It's not so easy to leave!" The ghost mother let Zhang Yu leave, and her body instantly turned into a huge dark cloud and rushed over.

Since the last time he fought with the demon monitor lizard, he was seriously injured and then injured by Zhang Yu again, the ghost mother was deeply ashamed of this matter, he devoured a large number of creature souls during this time, although the soul energy of these underground creatures is relatively low, the number is large enough, and he quickly recovered.

Although the underground spiritual power could also be recovered, the time dragged on, and he was afraid that Zhang Yu would leave here, so he hurriedly surrounded the Black Fort as quickly as possible.

After recovering her strength, the ghost mother was naturally full of self-confidence, although she felt that Zhang Yu's strength had changed a lot, but she didn't see it at all, he rushed over straightforwardly, trying to wrap Zhang Yu inside.

Zhang Yu frowned, he didn't expect the ghost mother to pounce so quickly, and he also felt that the ghost mother's cultivation was much higher than him, like looking up at the mountains.

His mind moved slightly, and the soul fire on his forehead and shoulders came out, he deliberately suppressed the cultivation, and the soul fire on his shoulders was white.

"Hehe, it's just a little Heavenly Master in the foundation building period, let's die!" Seeing the color of Zhang Yu's soul fire, he couldn't help but sneer and said, Heavenly Master cultivation is a sign of a large extent depends on the color of the three soul fires.

The ghost mother had no scruples, Zhang Yu instantly merged with Lin Xueyue, and the sword of the Nine Heavens Xuanjian in his hand rose wildly, facing the dark clouds of the ghost mother is a sword.

Seeing this, the ghost mother didn't dodge, she resisted hard, the sword of the Nine Heavens Xuanjian slashed on the ghost mother, the sword was quickly consumed, Zhang Yu was surprised, and ran backwards in an instant after shaking a sword.

"That's it?" the ghost mother sneered, a cat-and-mouse smile on her lips.