After the sun set, the entire Fire Spirit Mountain fell into a dead silence.

The bright moonlight paved the Fire Spirit Mountain with a layer of white light, but it still couldn't stop the scorching heat of the mountain.

Su Ruoxi cheered up, stood on the hillside and looked around, what could he find.

However, the view in the mountains at night was not good, and she found nothing.

Mu Zihan stared into the depths of the mountain, his brows furrowed unconsciously.

Su Ruoxi returned to Mu Zihan's side, and when she saw Mu Zihan's nervous look, she couldn't help asking, "What's wrong?" ”

Mu Zihan took Su Ruoxi's hand and explained as he walked: "I seem to hear something." ”

Su Ruoxi listened carefully when she heard this, but there was nothing but the wind.

However, in order not to affect Mu Zihan, Su Ruoxi didn't dare to speak, but followed Mu Zihan's side quietly.

After walking for about a stick of incense, they came to a clearing, and on all sides of the clearing, there were all hillsides less than 100 meters high.

"No way."

In the open space in front of her, Su Ruoxi's eyes were full of doubts, thinking to herself, could she still turn over the hillside in front of her?

Mu Zihan made a silent gesture, and suddenly pulled Su Ruoxi behind the big stone next to him.

Before Su Ruoxi could react, she heard the sound of many bees 'buzzing'.

She hid behind the boulder and saw a lot of red-glowing, firefly-like insects flying out of the mountain wall not far ahead.

There was obviously no exit from the mountain wall, but these glowing insects came out of thin air in this way, which surprised her.

Mu Zihan covered Su Ruoxi's mouth and didn't let her make any noise, until all the insects flew away, and then they came out from behind the stones.

"What were those just now?"

Su Ruoxi asked curiously, feeling that they were like fireflies, but they emitted red light, and they were like small fireballs in the distance.

"It's a poisonous fireworm, it's dangerous, don't let them find us."

Mu Zihan whispered, and then took Su Ruoxi to the stone wall that could fly out poisonous fireflies.

"Strange, how did these poisonous fireflies fly out?"

Su Ruoxi was curious about the stone wall in front of her, and carefully touched the stone wall with her hand.

She noticed that there were many small holes in the stone wall, which were not easy to see with the naked eye, but the uneven touch was obvious to her hands.

Finding the hole, Su Ruoxi continued to look for it on the stone wall.

"These insects can fly out of the stone wall, which means that there must be a cave behind the stone wall!"

Su Ruoxi analyzed and said, but she didn't know if the cave behind the stone wall was the entrance they were looking for.

If it's just a nest of poisonous fireflies, it's dangerous to go in.

Mu Zihan put his ear on the stone wall and listened carefully to the sound inside.

His brows were furrowed, and his expression was not >very good

"There are still a lot of poisonous fireflies in here, let's be careful and get out of here first!"

"And what about the entrance we're going to find? Is this it? ”

Su Ruoxi was puzzled by Zihan, Mu Zihan nodded and responded: "It's here!" It's just that poisonous fireflies come out at night, and they don't come out of their wormholes during the day, so we have to wait until tomorrow to find a way to get in. ”

"How can you be sure the entrance is here?"

Mu Zihan explained as he walked: "I once had a book about the Heavenly Domain, and one of the articles in it was the spiritual seal that was recorded. ”

"As mentioned in the book, where there is a spiritual seal, there must be a large number of poisonous fireflies, and there is obviously a worm nest behind this stone wall, so there may be a spiritual seal in the cave!"

Hearing Mu Zihan say this, Su Ruoxi was much more relieved.

She didn't know these things yet, and thought that it was better to bring Mu Zihan here, otherwise it would not be easy for her to find it so quickly.

Su Ruoxi and Mu Zihan found a safe place to rest, she leaned on Mu Zihan's shoulder, and soon fell asleep.

In the past few days, she has been on the road and has not had a good rest, so that when she stopped, she felt extremely tired.

Ruoxi slept quietly, and Mu Zihan straightened his waist, so that Su Ruoxi could sleep more comfortably.

In this way, in order not to wake her up, he did not dare to move or sleep all night, so as not to be attacked by poisonous fireflies.

When the sun rose the next day, Su Ruoxi felt a dazzling light and woke up.

"Are you awake?"

If you wake up, Mu Zihan smiled and said hello.

Su Ruoxi got up, stretched a big waist, and said with a smile: "I feel a lot more energetic now, let's go to the situation on the other side of the wall!" ”

"Good!"

Mu Zihan agreed, but his action was slightly mechanical, he moved his already numb arm, and returned to the open space with Su Ruoxi.

The situation was clearer during the day, and Su Ruoxi could clearly see the lines of the wall and some of the tiny holes.

"How are we going to get in? Can't you smash this stone wall open? ”

Su Ruo regretted turning his head to Zihan, Mu Zihan shook his head, and said, "If you smash the stone wall open, the movement is too big, and it will frighten the poisonous fireflies inside." ”

Mu Zihan thought for a while, and then continued: "If it's a pity, give me the water bag!" ”

Su Ruoxi didn't understand what Mu Zihan was going to do, but she quickly took out the water bag in the bag and handed it to Mu Zihan.

Mu Zihan poured someone on his hand, and then squared his palm on the stone wall.

At this time, Su Ruoxi clearly knew that when Mu Zihan's hand touched the stone wall, the solid stone wall immediately turned into sand and fell off with a bang.

"What's going on?"

Su Ruoxi was surprised by the previous scene, and thought to herself, is this stone wall afraid of water?

So, she learned Mu Zihan's method and dipped her hands in water to touch the stone wall, but strangely, nothing happened, as if only Mu Zihan could melt this stone wall with water.

When all the bags of water were used up, Mu Zihan made a hole more than one meter high on the originally completely closed stone wall.

Although Su Ruoxi felt curious, she didn't ask too much, but followed Mu Zihan into the cave.

The cave was pitch black, everything, Su Ruoxi was about to light a torch, but was stopped by Mu Zihan.

"Don't light a fire, it will attract the attention of those poisonous fireflies."

"Poisonous fireflies are afraid of cold light, we use the Night Pearl!"

As he spoke, Mu Zihan took out two night pearls from his baggage.

Su Ruoxi took advantage of the light of the night pearl to see the scene in the cave.

The cave is very large, and on the stone walls on both sides of the cave, there are thousands of small wormholes, and all of those wormholes are inhabited by poisonous fireflies.

Thinking of this, Su Ruoxi felt a tingling of her scalp.