Half a day has passed.

A day passed.

Five days passed.

......

This walk was more than half a month, and Lin San still didn't come to the end, and gradually, Lin San became a little anxious.

Lin San tried to release his divine sense, but as soon as his divine sense popped out an inch away, he was forced back by an inexplicable force.

"Damn, how long will it take!!" Lin San really couldn't stand it, it was the first time he had encountered this situation, and he didn't stay for a while, it was all torment for Lin San.

Do you really want to return to the Hongmeng Realm, and then return to the Spirit Realm through the teleportation array?

Lin San was unwilling, really unwilling! Finally entered the gate of the underworld, and left like this, Lin San couldn't do it, but if he didn't go back, would he have to be lost in this boundless darkness all the time?

"Forget it, I'll go for a few more days, and if I can't see the end again, I'll return to the spirit realm!" Lin San took a deep breath, suppressed the irritability in his heart, raised his feet and continued to walk forward.

This walk, another half a month, still not to the end.

Lin San really couldn't stand it anymore, and when he was about to return to the Hongmeng Realm, the voice of the black beast suddenly sounded in his mind: "Master, have you already entered the gate of the underworld?"

"Yes?" Lin San nodded.

"No wonder I sensed extremely pure yin qi, master, can you release me now? I'm hungry again!" the black beast said embarrassedly.

Lin San's heart moved, maybe the black beast could find a way to enter the underworld with its special sense of yin qi, thinking of this, Lin San hurriedly released the black beast.

As soon as the black beast came out, it opened its big mouth and began to suck in the yin qi around it...... As long as the stomach is swollen, he can't suck it in, so he reluctantly stops, and the black beast chirps: "It's so full, it's so cool!"

"Black Beast, can you find a way into the underworld?" Lin San asked expectantly.

"Passage?" The black beast twitched its nose, then raised its furry hand and pointed to the left front: "The yin qi in that direction is so thick, the passage should be over there." "The reason why there is so much yin qi here is because it gushes out of the passage of the underworld, so the place where the yin qi is thickest should be the location of the passage.

Lin San was overjoyed: "Lead me quickly!" Lin San originally wanted to have the mentality of trying, but he didn't expect that the black beast could really find a passage to the underworld.

The black beast nodded, and took a big stride in the direction where the yin qi was the strongest.

Lin San followed closely behind.

As the black beast walked, it kept twitching its big nose and walked towards the place where the yin qi was thick.

I don't know how long it took, a small black whirlpool suddenly appeared in front of me, and streams of extremely pure yin qi were slowly wafting out of the whirlpool.

"This person, this whirlpool should be the passage you are looking for. The black beast said.

"Black Beast, thanks to you this time, otherwise I would have returned in vain. Lin San sincerely thanked.

"It is the honor of my black beast to serve my master. The black beast smiled innocently.

"Okay, you go back to the spirit beast ring, and I'll let you out again when I have a chance. "I'm about to enter the underworld, Lin San doesn't want any accidents, the black beast is too "outstanding", and it specializes in devouring yin qi and yin souls, once it is discovered by the ghost soldiers of the underworld, he will definitely not let go of the black beast.

The black beast nodded, and returned to the spirit beast ring obediently.

Lin San took a breath and walked directly into the black whirlpool.

......

It was dark.

The ground is black.

Everything around is dark.

Lin San stood on a black stone and looked around suspiciously: "Is this the legendary underworld? It's really yin enough!" In fact, strictly speaking, the underworld is similar to the spiritual world, and there are roads and buildings, but everything is black, and you can't see the sun and moon here, let alone feel a trace of life, there is more darkness and boundless darkness here, and what floats in the air is yin and death.

There was one thing that made Lin San very happy, that is, he was able to use his divine sense at this time, Lin San carefully released his divine sense, scanned the situation within a radius of a hundred miles, and found that the surroundings were empty, and there was no figure in sight, oh, no, it should be a ghost, and there was not a single ghost in sight.

Lin San released the black beast, and then said, "Black beast, can you sense it again and see that the yin qi in that direction is relatively strong?"

The black beast twitched its big nose a few times, and then stretched out its hand and pointed straight ahead: "The yin qi in that direction is the strongest, if my guess is right, it should be the core of the underworld." ”

"yes, I see. Lin San put away the black beast, and rushed towards the front, while flying, Lin San carefully observed the situation below, hoping to meet the dark fire, but unfortunately, Lin San flew all the way, and saw some unique yin beasts in the underworld, but he didn't see any trace of the dark fire at all, and he didn't even see a ghost.

"Huhuhu......"

Suddenly there was a gust of yin wind in front of him without warning, blowing all over the sky with dust, Lin San was not careful, he was swept up by the yin wind, the yin wind was like a knife, blowing Lin San's face with a faint pain, Lin San was a little shocked in his heart, since he successfully cultivated the alchemy technique, his body has become harder than steel, and ordinary magic weapons can't hurt him, but he didn't expect that this yin wind can make Lin San's skin feel a faint pain.

The yin wind comes and goes quickly, and in a few moments, the yin wind disappears.

Lin San took a breath, stretched out his hand and rubbed his aching face, and said with palpitations: "This underworld is really evil, and it has such a great power when it blows a gust of yin wind, I hope I won't touch it again in the future......"

"Huhuhu......"

Just then, there was a noise ahead.

Lin San looked up, his face suddenly turned green, and there was actually a yin wind blowing in front of him, and before Lin San could react, the yin wind had already come to the front, directly rolling Lin San up, and a new round of torture began again......

This time, the yin wind lasted for a shorter time, and after only a few breaths, the yin wind disappeared.

"......Huh" Lin San just breathed a sigh of relief, and a yin wind appeared in front of him, Lin San couldn't help but scold: "Grass! It's endless!!" This time Lin San didn't wait to be tortured, but returned directly to the Hongmeng Realm, and waited until the Yin Wind dissipated, Lin San came out of the Hongmeng Realm, and then quickly flew forward.

I don't know what's going on, this yin wind is blowing endlessly, and Lin San is constantly shuttling back and forth between the Hongmeng realm and the underworld.

......

It took days.

The yin wind finally stopped, and it never blew again, and at this time, Lin San had come to a vast mountain, as far as the eye could see, the mountains overlapped, dense, innumerable, Lin San flew up, quickly walked between the mountains, because there was no Yin wind to block, so Lin San's flight speed became much faster.