If any creature is immune to this along the way, won't it be dead? Zhou Fat'er sighed bitterly with a bitter face.

"Don't worry, I'll find a way to ensure the safety of the two of you, or the same sentence, if there is danger, run to prison, is there anything else besides this bottle?" Zhang Yu asked.

"Of course, I took a bottle secretly. Perhaps a little disappointed, Zhou Fat'er said dejectedly.

"I see, I still have something, I'll take this bottle. ”

"En!" Zhou Fat'er said absentmindedly, Zhang Yu said hello to Wang Chensheng with a wry smile, and returned to the house to continue cultivating.

There is no task for him here for the time being, because all the disciples in the foundation building period are recuperating and participating in more brutal battles at any time, Zhang Yu believes that as the battle progresses, Zhao Xiao will figure it out.

An enchantment was placed to isolate the noise of the outside world, and Zhang Yu continued to cultivate the Heavenly Master's Secret Codex.

It may be that the entire Black Castle is located above the spirit stone vein, so the aura here is full, and some of the inner disciples who come here are upgrading faster, and Zhang Yu can see that the aura is continuously transformed into yin and yang qi, pushing the rotation of yin and yang fish.

This rotation speed is both slow and firm, I don't know how long it took, the yin and yang two fish finished turning a circle, and when it turned to the end, a powerful force erupted in the dantian, and the scriptures of the Tao Te Ching came from the ears.

If someone is here, they can see that at the moment when the power exploded, three soul fires appeared on Zhang Yu's shoulders and forehead, burning fiercely.

His soul fire gradually turned from white to blue, and Zhang Yu instantly understood the role of the soul fire, which could not only mark the level, but also be used as a weapon, which was extremely powerful.

Fortunately, there was an enchantment package, and his promotion was not noticed by anyone, but the ghost domain has been fighting with the Heavenly Master for many years, and the ghost mother is very sensitive to the aura of the Heavenly Master, and at the moment when Zhang Yu was promoted, he felt it all of a sudden, and his pupils couldn't help shrinking.

Zhang Yu can't be allowed to leave alive, he must be killed at all costs, the ghost mother thought in her heart.

Almost at the same time, the creatures under his command instantly became even more frantic as if they had been beaten with chicken blood, and some of the underground behemoths were sent out, constantly consuming the ammunition of the Flaming Crossbow.

"Kill!" one of the inner disciples shouted.

A flaming crossbow beside him continued to fire, and the thick strings of the crossbow resounded throughout the sky above Blackcastle.

In normal training, this kind of crossbow is required to change the bowstring and check the machinery when firing dozens of crossbow arrows, but the waves of monsters are destined to make the flaming crossbow unable to be repaired.

"Release!" the inner disciple shouted loudly, and just as one of the outer disciples was about to hit the trigger with a hammer, the bowstring suddenly snapped, and lightning swept through the air, right in the face of a disciple next to him, only to see him fall to the ground silently, his head cut in half by the sharp bowstring.

He was the first disciple to die in battle, and the crowd was already numb, and immediately someone dragged his body away, replaced the bowstring and continued to fire.

With the passage of time, the spiritual power reserves and energy of all the disciples were a huge test, and the accuracy of the Flame Crossbow decreased.

"Contact!" someone shouted, only to see a cave python full of crossbow arrows rushed over, slamming into the enchantment, everyone felt the enchantment tremble, and several inner disciples sacrificed magic weapons before beating the giant python back.

The python's eyes instantly turned red, and it swooped down frantically, slamming into the barrier again, as if it didn't know the pain.

"Shoot it! Don't let it break the barrier. The inner disciple shouted loudly, and several flame crossbows immediately turned their heads and set fire at the giant python!

The giant python's triangular head was shot in an instant, and the corpse fell under the city wall at once. Although the python was dead, the corpse raised the level by a few meters, and several mice actually jumped up when they were caught off guard.

"The rats are coming!" shouted the disciples on the city wall, and although several of the outer disciples who supported them chopped the rats to death, this also marked the beginning of the fall of the outer wall.

As long as the barrier is broken, the outer wall will immediately be unable to hold it, Zhao Xiao also knows this, on the one hand, he asked people to strengthen the barrier, on the other hand, he transferred materials, and a lot of elixirs were eaten by disciples, fortunately, this is the Dan Dao sect, and there is no shortage of pills at all.

When the ghost mother saw this scene, the corners of her mouth couldn't help but turn up, and dozens of monitor lizards seemed to have received an order, and they rushed towards the Black Castle in unison.

A disciple who specially observed saw dozens of monitor lizards crawling out of the cave with the pupil technique, and couldn't help but be shocked, and hurriedly told Zhao Xiao about the situation.

"Monitor lizard?" Zhao Xiao was startled, he appeared on the city wall in an instant, and saw dozens of white dots crawling over from a distance.

"All the flame crossbows are aimed at the monitor lizards, and they can't be allowed to climb up to the top of the city, and all the disciples who have cultivated during the foundation building period come to the main hall. Zhao Xiao's voice echoed in the sky above Black Castle! Everyone's hearts were shocked, knowing that the most arduous moment had come.

Zhang Yu opened his eyes suddenly, the Taiji diagram in his eyes flickered, he felt the unprecedented clarity of his six visions, and as soon as his mind moved, the blue soul fire on his forehead suddenly flew up, circling around, as if he could control it.

Zhang Yu experimented, and the soul fire was as sensitive as an arm, and it could be released more than twenty meters away. As for the power of the soul fire, Zhang Yu suddenly thought that Xiao Hei had seen it before and summoned it.

"Your soul fire is a great threat to ghosts. Xiao Hei popped out, looking at the soul fire floating in the air with fear.

"Oh, really?" asked Zhang Yu curiously.

"Of course, the soul fire is one of the most important weapons of the Heavenly Master, in the past, there were ghost domain people besieging several Heavenly Masters, and those Heavenly Masters knew that there was no hope of survival, so they collectively urged the golden soul fire, that is really dead when touched, and injured when rubbed, I have seen an eight-headed ghost python directly killed by the soul fire. Blackie was caught in the memory, his pupils filled with fear.

"So powerful?" Zhang Yu became excited, he operated the soul fire to circle around for a while, and found that the consumption of yin and yang qi in the dantian was particularly fast, you must know that the dantian expanded a lot after being promoted, and it couldn't hold up the consumption, which shows how powerful this soul fire is.

At this moment, Zhang Yu heard Zhao Xiao's voice, he hurriedly withdrew his soul fire, beckoned to Xiao Hei, turned around and disappeared in place.

It may be that Zhang Yu came relatively quickly, and the other disciples have not yet arrived, only Zhao Xiao and Ouyang Mu are discussing things in the main hall, and seeing Zhang Yu appear in the main hall, Zhao Xiao hurriedly beckoned to him.

"I didn't expect Senior Brother Zhang's cultivation to improve, congratulations!" Ouyang Mu couldn't help but light up when he saw Zhang Yu, cultivators were particularly sensitive to the matter of cultivation, and they could clearly detect the change in cultivation.

"Don't dare!" Zhang Yu said modestly.

"I've considered your proposal in detail, I don't know what detailed plan you have?" Zhao Xiao also changed the topic after congratulating. In today's city defense battle, he saw the Ghost Mother's determination to break through the Black Castle.

In just a few hours, the outer walls were on the verge of falling, so that before reinforcements could be reached, the Black Castle would be breached.

Based on this consideration, Zhao Xiao thought of the method Zhang Yu said.

"What's the situation now?" Zhang Yu asked instead of answering.

"In the stalemate phase, I just found that dozens of monitor lizards have started to attack the castle. Zhao Xiao said.

Zhang Yu's conditioned reflex is the demon monitor lizard, but after thinking about it, dozens of monitor lizards should be ordinary goods, but ordinary goods are all giant beasts more than ten meters high, this kind of monitor lizard lives alone, constantly wandering in their own territory to forage for food.

Originally, when the demon monitor lizard was there, these monitor lizards didn't dare to come, but as soon as the demon monitor lizard died, countless monitor lizards came to fight for territory, allowing the ghost mother to pick up a leak.

The arrival of the monitor lizard also marked the possible fall of the outer wall, Zhang Yu thought for a moment and said: "I will lead an elite team to kill these monitor lizards, and the ghost mother will definitely take the bait when she sees it, and then we will abandon the outer wall and set up an ambush in the urn city......"

Zhang Yu said the details slowly, Zhao Xiao and Ouyang Mu frowned and listened, calculating the gains and losses fiercely in their minds.

"If you're lucky, you'll be able to destroy the ghost mother ...... one fell swoop"