Hearing that Meng Tiandong was back, Zhao Xiao became excited, he hurriedly summoned Meng Tiandong in, and asked carefully what happened.

Meng Tiandong knew that the test was coming, he hurriedly said the reason he had thought of on the road, Zhao Xiao couldn't hear any flaws, and waved his hand to let Meng Tiandong go down to rest.

"What's going on?" Just as Zhao Xiao was frowning and thinking, Ouyang Mu's voice sounded.

"Senior Brother Ouyang, aren't you resting, why did you run out and do something?" Seeing Ouyang Mu's pale and bloodless face, Zhao Xiao hurriedly stood up and asked.

"After a few days of rest, it's okay, I heard that someone has come back, so I came over and asked. Ouyang Mu said with a smile.

"The situation is not very good......," Zhao Xiao said Meng Tiandong's words.

After Ouyang Mu listened, he was silent, and he habitually pinched his fingers and counted hexagrams. Zhao Xiao didn't bother him, but looked at him hopefully.

"Alas, the situation is even more critical, I just calculated and found that the two of us are mortal signs...... Ouyang Mu raised his head with a trembling voice and said.

"What?" Zhao Xiao said loudly as he stood up.

No one wants to die, and it is this kind of unexplained death, Zhao Xiao will be promoted to the Dan stage in a long time, and the future is immeasurable.

"What the hell is going on?" Zhao Xiao asked with red eyes and heavy breathing.

"The hexagram of a few days ago has changed too much from today, but ...... Wait, an unexpected turnaround?" Ouyang Mu suddenly discovered something, his eyes were slightly closed, and his fingers were like phantoms.

"Unexpected turnaround?" Zhao Xiao's expression was stunned, he stared at Ouyang Mu's movements tightly, his eyes full of hope.

"Whew, there is indeed a turnaround, but I don't know what the turnaround is?" Ouyang Mu opened his eyes and smiled bitterly.

"Since there is a turnaround, it's good to ......" Zhao Xiao breathed a sigh of relief, he comforted Ouyang Mu a few words, and after Ouyang Mu left, he sat in the hall and pondered.

He was thinking about what had happened in the last month, the supply team had been attacked, several squads had gone missing, what was the connection between these?

Could it be that Meng Tiandong has not come back alive twice in a row, and none of the inner disciples have come back alive, and Meng Tiandong, who is at the sixth level of qi refining, is actually so lucky. You must know that the disciples of the outer sect of the Black Iron Castle are cannon fodder, and no matter how many sects die, they will not feel distressed.

Facts have proved that the disciples of the Black Castle and the Chinese and foreign sects also died the most, could it be that there is something wrong with Meng Tiandong? Zhao Xiao frowned.

After Meng Tiandong returned to his residence, he locked himself in his room, and even his henchman Liu Hansheng did not see him, and everyone thought he was frightened and didn't pay attention to him.

Meng Tiandong told the ghost mother about his situation, and the ghost mother asked him to wait for news, and it was absolutely uncomfortable to be in Chu Ying's heart in Han, Meng Tiandong stayed in his hut in order to avoid suspicion, and he meditated on how to close the main defensive barrier of Black Castle.

"Knock knock!" there was a knock on the door.

"Who?" Meng Tiandong was awakened, and he couldn't help but ask out loud.

"We are from the patrol team, and we want to take you to assist in the investigation!" came a cold voice from the outside door.

"Okay, I'll come out right away!" Meng Tiandong was startled, he instantly had the urge to escape, but reason stopped him.

As long as he lived to see the destruction of the Black Iron Castle with his own eyes, he gritted his teeth, packed his things, and left with the patrol team.

Just when Meng Tiandong was being investigated, hundreds of miles away, the Ghost Mother was suspended in mid-air, and there was a shout of killing in the distance, and the endless gray tide around him rushed towards those few cultivators.

The Ghost Mother fled in embarrassment after being injured, absorbing the souls of underground creatures everywhere like crazy to replenish it, and in just a few days, an army of berserk rats appeared underground, and continued to increase in size at a snowball rate.

And Wang Ming's team was ambushed by the ghost mother, and suffered heavy casualties for a while, these cultivator souls are the best tonic, it devoured the souls of several foundation building period cultivators, and its strength recovered.

"Kill them!" Looking at the few cultivators who were still resisting, the ghost mother said coldly.

In an instant, the gray tide torrent drowned several cultivators.

After killing these cultivators, the Ghost Mother thought about it, and it sent a large number of rats to look for Zhang Yu's location everywhere, and the news obtained by all parties showed that Zhang Yu actually went in the direction of Black Castle.

"Sure enough, it's human, stupid compassion. The ghost mother said with a sneer, and it hurriedly gathered all the underground creatures and marched towards the Black Castle, preparing to take out the human stronghold of the Black Castle in one fell swoop.

After running wild for two days, Zhang Yu saw the huge outline of the Black Iron Castle, he carefully avoided the rats in the past two days, and also sent Xiao Hei and Lin Xueyue to form a protective circle around them, killing all the creatures that came close, but unfortunately he couldn't stop the number of rats, and finally was discovered by the green-eyed rats.

Seeing that his whereabouts were revealed, Zhang Yu thought for a moment, it was better to enter the Black Fort generously and use the momentum of the Black Fort to fight against the Ghost Mother.

"Zhang Yu is back!" When Zhang Yu came to the periphery of Black Castle, someone immediately reported this matter to Zhao Xiao.

Fat Er and Wang Chensheng happened to be at the city gate, and when they heard that Zhang Yu was back, they couldn't help but be overjoyed, and hurriedly ran to the city gate to greet Zhang Yu.

"Boss, you're finally back!" said Fat Er and Wang Chensheng excitedly.

"I'm back!" Zhang Yu nodded, and he felt a trace of warmth from the care of the two.

"By the way, I saw Meng Tiandong come back a few days ago, what the hell is going on?" After chatting a few words, the fat man said in a low voice.

"What? Meng Tiandong is back?" Zhang Yu was stunned, and couldn't help frowning, didn't Meng Tiandong already take refuge in the Ghost Mother? He actually dared to come back here? It seems that the Ghost Mother had already planned to attack the Black Iron Castle.

"Where is Meng Tiandong now?" Zhang Yu continued.

"Soon after I came back, I was investigated by the inspection team and should have been locked up. Wang Chensheng said in a low voice.

Zhang Yu frowned when he heard this, Meng Tiandong actually dared to come back? Obviously, he was the ghost mother who had planted it in the Black Iron Castle, and it was estimated that Meng Tiandong never dreamed that Zhang Yu would come back alive.

"I see. Zhang Yu nodded.

In the highest hall of the Black Iron Castle.

"What? Zhang Yu is back? Let him in. Zhao Xiao was walking around the hall, and his eyes lit up when he heard that Zhang Yu was back, and he hurriedly asked Zhang Yu to summon him in.

Zhang Yu accepted the summons to come to the main hall, Zhao Xiao couldn't help but be stunned when he saw him, he felt that Zhang Yu was a little different from before, and he felt very strange.

In order to avoid misunderstanding, Zhang Yu still sealed his power into the third layer of qi refining before he came back, Zhao Xiao didn't look carefully, and when he saw Zhang Yu walking in, he couldn't help asking, "Zhang Yu, why did you come back alone?"

"Senior Brother Zhao, something is wrong, the people of the Ghost Domain have already submerged underground. Zhang Yu pretended to be flustered and said.

"What?Ghost Domain?" Hearing Zhang Yu's words, Zhao Xiao looked at Zhang Yu in shock, the news of the appearance of the ghost domain people had been notified to him, but how could the ghost domain people appear underground......?

"What the hell is going on?By the way, what about the others?What about Senior Brother Qian Chengming?" Zhao Xiao took a few deep breaths and reluctantly calmed down and asked.

"They're all dead......"

"What ......"