"What a terrifying thing!"

Jiang Ming was shocked. He quickly withdrew all his spiritual energy into his spiritual core and slapped on a few seals to cut off his connection with the outside world.

"This fog is simply the ultimate nemesis of immortal cultivators. Even if a Foundation Establishment Realm cultivator were to come here, he would probably be sucked dry. If this fog enters the spiritual core, who knows what kind of consequences it will have," Jiang Ming muttered. However, his eyes soon widened. "If I can take it away and release it when facing an enemy, it will be a killing blow. At the very least, no one under the Foundation Establishment Realm can block it!"

Jiang Ming did what he said. He took out an empty wine gourd, which was a magical tool, and aimed it at the gray fog.

The grey fog surged and went into the wine gourd. However, in the next moment, this wine gourd, which was a magical tool, suddenly lost its luster. Then, a crack appeared, and the fog escaped.

The wine gourd had already turned grey, becoming an ordinary object.

"This fog can even destroy magical tools?"

Jiang Ming was extremely shocked. Although he was pleased with the effect, he had a headache. How could he collect this fog without a magical tool?

Jiang Ming originally just wanted to collect the fog as a test. His real purpose was collecting the black gas. He did not expect his plan to be nipped in the bud.

"Other than the magical tools I have, is there anything else that can store this fog?"

Jiang Ming frowned and pondered. Suddenly, he was stunned and quickly took out an item from his storage ring.

It was a black stone slab with the scripture of the Thunderclap Technique engraved on it. Although this object looked ordinary, it came from the same source as the mysterious black sword.

"I'll try this as a last resort. If this still doesn't work, then I can't do anything."

Jiang Ming did not have much hope. He did not want to stay here for too long. It was more important to find the way out as soon as possible.

As Jiang Ming flew forward, he shook the black stone slab. However, the stone slab was still lifeless and did not move at all.

"As expected, it's useless!"

Just as Jiang Ming shook his head in disappointment and was about to take back the slab, he suddenly had an idea and injected a wisp of blood Qi into the black stone slab.

The black stone slab, which had been still all this time, finally trembled violently, as if it was awakened by Jiang Ming's blood Qi. Blood-red lines filled the runes, exuding an ancient and boundless aura.

If he did not see that the black sword could release blood Qi, Jiang Ming would never have thought of driving the black stone slab in this way.

Who would have thought that blood Qi could also activate treasures like this?

Jiang Ming felt a little bitter when he thought of the black stone slab that had been in his hands for one or two hundred years. It took so long for him to realize that it could be activated like this.

"A lack of knowledge will kill people." Jiang Ming shook his head.

A moment later, as the blood Qi was injected into the black stone slab, Jiang Ming's consciousness could also slowly explore the interior of the black stone slab, and he had a preliminary understanding of it.

"This thing also seems to be an offensive magical tool!"

Jiang Ming looked at the surface of the stone slab, where many small runes were flashing with blood-red light. He had a feeling that he could activate them at any time.

"Let's wait for someone to cross me! I'll test it out on them."

Jiang Ming also sensed the complicated cracks inside the black stone slab. They seemed to be exponentially finer than hair. However, when he sensed them carefully, they seemed to be infinitely wide.

"Why do I feel like it's the same as the blood vessels and meridians in the human body? It seems that this black stone has quite a big secret."

The black stone slab and the black sword seemed to be hiding a deadly secret.

"I'll slowly explore it in the future!"

Now that his research was in vain, Jiang Ming no longer thought about it. Instead, he poured more blood Qi into it and tried to activate the black stone slab to absorb the surrounding fog.

The black stone slab trembled, and a blood-red light flickered on it. The wisps of fog in the surrounding void actually poured into it.

"What? You're being picky?"

Jiang Ming was a little speechless. The black stone slab only absorbed the dark gas and directly flicked away the gray fog that came rushing over, not letting a trace of it enter the black stone slab.

"Forget about it. It's better than nothing. Although the quantity is small, the quality is higher," Jiang Ming thought to himself as he urged the black stone slab to continue flying forward.

After a while, Jiang Ming suddenly felt that the fog in front of him seemed to have become thinner.

Jiang Ming suddenly rushed out of the fog channel, and the pressure on his body was reduced. There was nothing in front of him. It was a huge underground space, thousands of feet high, with strange rocks, dark and silent, and not a sound could be heard.

In the dim light, the ruins of a palace lay quietly in front of them. No one knew how long it had been sleeping here.

At the end of the ruins, there seemed to be a glimmer of light falling from the sky. The mottled light continued to spread to the surroundings.

The faint light was the only light in this space, allowing Jiang Ming to barely see the scene in front of him.