"Refining the Eye of the Netherworld is very simple, as long as you drop a drop of your own essence blood on the Heart of the Netherworld, and then refine it according to the method!" Qi Luyi immediately passed on a set of refining techniques to Lin Feng.

Lin Feng immediately kept this set of recipes in his heart, and then practiced slowly, and when he encountered something he didn't understand, he asked Qi Luyi for advice, and Qi Luyi explained Lin Feng's doubts in detail one by one, and when Lin Feng mastered this set of recipes, Qi Luyi told Lin Feng some precautions and convenient tips when refining.

By the time Lin Feng had completely mastered it, five or six hours had passed.

Through Qi Luyi's explanation, Lin Feng also knew that the Eye of the Netherworld is a multi-form existence that can evolve into any form of nature, such as the eye of the wind, the eye of fire, the eye of spring, the eye of trachoma, etc., but no matter how the eye of the underworld changes, its core------ the heart of the underworld will not change!

It's like the eye of the underworld is just the appearance, and the heart of the underworld is the real inside, and everything is inseparable, which is the truth.

"But where is this heart of the underworld? Could it be in the whirlpool that we have just been drawn into? After Lin Feng mastered the method of refining, he searched around, but did not find the heart of the underworld, so he asked.

Qi Luyi smiled bitterly when he heard this: "I don't know this anymore!" The heart of the underworld is the heart of the eye of the underworld, and many times it does not exist as a substance, so I don't know where the heart of the underworld is, but it is definitely not in the eye of the underworld that sucked us in just now, the eyes of the heart are different, this is the truth, this heart of the underworld must be in this small world, but where it is, you can only rely on yourself to find it. ”

Lin Feng couldn't help but smile bitterly when he heard this, but now that things are developing in his favor, no matter what, this Yin Heart must be found and then refined!

The temptation of this small world is too strong for Lin Feng!

In fact, such a small world coexisting with the world, how could it not only make Lin Feng's heart move? As long as you are a cultivator, there is no one who will not go crazy about it!

Even Qi Luyi, who has seen countless rare treasures and countless spiritual materials of heaven and earth, is also thrilled in his heart at this time, but Qi Luyi can't recover this small world, but this does not affect Qi Luyi secretly slandered in his heart: "Why does this stinky boy always take such shit luck?" ”

However, at this time, Qi Luyi naturally wouldn't be distracted to disturb Lin Feng.

At this moment, Lin Feng was walking around this small world, and in the process of walking, Lin Feng had been releasing the spirit element, not only to find the heart of the underworld through his eyes, but also to sense it through the spirit element, hoping to find the heart of the underworld as soon as possible.

This small world has a diameter of about four hundred meters, and it only takes ten minutes to walk back and forth around the entire small world, but Lin Feng has already walked seven or eight times back and forth, and he still hasn't found the existence of the Heart of the Netherworld!

However, Lin Feng didn't feel the slightest bit of frustration, the more he couldn't find it, the more it showed that this Yin Heart was extraordinary, and Lin Feng's determination to find the Yin Heart became stronger and stronger!

Thinking of this, Lin Feng once again followed the previous method and searched for a few laps, but the result was still nothing.

"Old liar, what do you think this underworld heart looks like? This world is so big, I've walked around it more than a dozen times, and I still haven't found anything abnormal, as if this Netherworld Heart is no longer in this world at all! Lin Feng opened his mouth to ask, after all, Qi Luyi was well-informed, maybe he would find something.

Qi Luyi also frowned when he heard this, and he was puzzled in his heart.

It stands to reason that Lin Feng couldn't find the mood of the underworld with the naked eye, but he couldn't find it with the spirit element, which was a bit too much!

Lingyuan is a force between heaven and earth, which can sense things that ordinary senses cannot perceive.

Under normal circumstances, Lingyuan cannot perceive the things that exist around them, and there are several situations.

One is that the surroundings are forbidden, so that Ling Yuan cannot peek into the things in the forbidden, but if there is a prohibition around, Ling Yuan will sense the existence of the forbidden, unless this prohibition is arranged by a monk who is several times higher than Lin Feng's cultivation!

Another situation is that the strength of the Heart of the Netherworld is far higher than Lin Feng, so Lin Feng's Spirit Yuan can't sense the existence of the other party!

However, these two conclusions were vetoed by Qi Luyi as soon as they came out!

The small world behind the Eye of the Netherworld, which monk would not blush when he saw it? Would you not want to keep it for yourself? If there really is a cultivator whose cultivation is much higher than Lin Feng's forbidden formation here, I am afraid that his person is close to the left, Lin Feng has entered the small world behind the Eye of the Netherworld for such a long time, and the person who has placed the prohibition will definitely find out, and then get rid of Lin Feng and prevent this secret from leaking.

Of course, there is another possibility here, that is, the monk who arranged the forbidden formation has died, but if this monk has died, then the prohibition in this world will immediately disappear with the death of the monk who arranged the formation, after all, this is not the real world outside, but a small world that coexists with the real world, once the power to maintain the formation disappears, the formation in the small world will also disappear!

So, the first possibility is largely ruled out.

And the heart of the underworld is only one of the most primordial energy existence in heaven and earth, no matter how many years it exists, even if it has existed since the beginning of heaven and earth, it will not produce spiritual intelligence, and it is impossible to hide itself in front of outsiders, so the second possibility is also ruled out.

Now that both of the most likely scenarios have been rejected, where is the heart of the underworld?

After Lin Feng listened to Qi Luyi's analysis, his whole person couldn't help but fall into deep contemplation.

"The Eye of the Yin and the Body of the Taiyin, both of them are the most primordial forces between heaven and earth, and in the final analysis, they can be regarded as homologous existences."

"The heart of the underworld is where the spirit of the eye of the underworld is, and the eye of the underworld is also a general existence, so it should also be the same source of power as me, the body of the yin!"

"But why can't Lingyuan find the existence of the Heart of the Netherworld?"

"Could it be that if you want to find the heart of the underworld, you can only rely on the power of the most primordial source?" Such an idea suddenly popped up in Lin Feng's mind!

"The most primordial power? The old liar is always saying that I am the body of the Taiyin, so what is the origin power of the body of the Taiyin and the heart of the underworld? Lin Feng pondered secretly in his heart.

"The power of the Origin? The Power of the Source"

As time passed, Lin Feng sat cross-legged in this small world, feeling what the "power of the origin" was, while Qi Luyi was rare and did not make a sarcastic remark, but quietly stood aside.

"Yes!" I don't know, how long it took, Lin Feng suddenly opened his eyes!

"I don't know what the most primordial power is! But I know how to find the heart of the underworld! Lin Feng almost laughed and said, his joy was beyond words.