Seven days ago, it was precisely because of Yunxi's reminder that Du Feng discovered the prismatic hole in the ground, and also found that in the hole, only a small piece of black crystal remained.

Although Du Feng didn't know what would happen after putting the black prismatic crystal in his hand into it, since there would be such a coincidence, and in the black prismatic crystal, he did sense an inexplicable energy, so he still subconsciously put the black prismatic crystal in his hand into it.

After that, half of the black prismatic crystal that Du Feng put in instantly turned gray-white, as if half of the energy in it had been instantly drained.

And just when the two of them didn't feel anything happening, many very mysterious lines appeared on the ground under the feet of the two of them, and finally they converged to form a circle, and finally the circle of light in front of them appeared that could block the black shadow.

It was precisely because of the existence of this aperture that the two of them were able to survive in this extremely dangerous hall for seven days.

However, after that, they found that they still had to face an extremely difficult problem, and that was the extremely rapid consumption of energy within the black prismatic crystals.

The energy in a black prismatic crystal was half drained the moment it was put in, so it could only last for nearly two days.

This also prompted the two to take a risk, before the energy in the black prismatic crystal was exhausted, to find a new crystal, and only in this way could this aperture be maintained.

Fortunately, at the very beginning, the strength of the black shadow monsters that the two of them faced was not very high, and the only thing to pay attention to was that five of them were comparable to the black shadow monsters of mid-innate cultivators.

It's just that as the two of them continue to hunt, these black shadow monsters also seem to be vigilant, and show a certain amount of wisdom, making it more and more difficult for the two to obtain black prismatic crystals.

And this time, the two of them almost fell into their encirclement, if it weren't for Du Feng's complete explosion of his cultivation in the moment he realized it, killing one of the black shadow monsters, and thus escaping back into the aperture, I'm afraid the two of them would be more than lucky now.

Looking at the prismatic crystal with only one-tenth of the black left in front of him, Du Feng's eyebrows were furrowed, and his face became more and more ugly.

"Brother Du Feng, it was the little sister who dragged you down, otherwise, with your cultivation and strength, you would definitely be able to leave here, and you don't need to fall into danger with the little sister here", Yunxi said with a very apologetic face.

However, the truth is just as she said, in terms of her cultivation that is not yet in the acquired realm, in this weird and gloomy environment, she knows nothing, and there is a terrifying existence that far exceeds her cultivation, Yunxi really can't help much, and even often needs Du Feng to pull her through some sudden dangers.

"You're not right, although my cultivation is much stronger, but there are several monsters with the same strength as me outside, even if I can escape, it's just a matter of catching some time, if so, it's better to stay here", Du Feng comforted Yunxi with a smile.

He then stopped talking about it, but took out three small flags of the same size from his storage bag, and after a moment of thought, placed them in different places at the edge of the aperture, and finally took on the shape of a triangle.

At this time, Yunxi already knew what Du Feng wanted to do, so he hurriedly pulled out his scimitar weapon, and walked quickly behind Du Feng, although the aura on her body was only the peak of the dantian stage, it still released it, and her beautiful eyes were staring closely at the surrounding darkness.

"Yunxi, you have to get ready", Du Feng shouted loudly.

After getting Yunxi's nod, the true qi in Du Feng's hand gradually emerged, and then several extremely complex seals were pinched out, and finally these seals full of true qi were beaten on the three small flags one by one.

A faint three-color light began to appear on the small flag that had obtained the True Qi Seal, and then gradually released it, turning into a three-color pyramid, enveloping the two of them inside.

At this time, after Du Feng pinched out a few seals, the aura on his body also weakened instantly, and the little true qi that was left was directly emptied.

It was at this time that three black shadows appeared very abruptly in the darkness, they also showed a triangular position, standing three meters away from the aperture, and judging from the tyrannical aura coming from their bodies, they were all comparable to Du Feng in his heyday.

Seeing the appearance of these three black shadows, even Yunxi, who had already been prepared, couldn't help but become solemn, with a slight pale appearance on her pretty face, and the aura on her body also fluctuated a lot.

Du Feng's prostration face smiled as expected, and then said: "I guessed correctly, you monsters are becoming more and more shrewd now, not only have you learned to use your brains, but you have also calculated this point in time, so you will wait for the rabbit in the dark."

From Du Feng's words, such a situation has obviously appeared many times, but this time there are three black shadows comparable to the middle of the innate stage, which is still beyond Du Feng's expectations.

"Yunxi, remember one thing, your movements must be fast, otherwise my three-talent array will not be able to stop the simultaneous attack of the three monsters, and then I will hand it over to you", Du Feng cast a trusting look at Yunxi, who was waiting for the battle at this time, and smiled at the same time.

At this time, Yunxi already understood the danger they were about to face, and after receiving Du Feng's signal, he carefully took the black prismatic crystal he had just obtained from Du Feng's hand, looked at the ground very solemnly, and his slender hands made movements in an instant.

It was also at this time that the three black shadow monsters surrounding the aperture let out an inhuman howl at the same time, as if they wanted to interfere with Yunxi's replacement of the black prismatic crystals, and they jumped towards the three-color pyramid where the two of them were at an extremely fast speed at the moment when the aperture disappeared.

It's just that Yunxi was not affected by them, and she was extremely concentrated in just one-tenth of her breath, and she swapped two black prismatic crystals with different energies.

It was at this time that the three black shadow monsters also rushed to the edge of the aperture, and were about to touch the three-color pyramid that enveloped the two of them.

It was only at this moment that the extinguished aperture lit up again, and a shrill scream that seemed to be formed by the convergence of thousands of different voices instantly sounded in their mouths, illuminated by the light on the aperture.

And at this time, the black shadow monsters that had been in the dark finally revealed their true colors under the illumination of the light.

It was a strange creature covered in extremely thick red hair, and even their faces were covered by these long hairs, so that it was impossible to see their true appearance, but they had normal human limbs.

However, on their backs, there are many white bone spurs of different lengths, and what makes people feel terrifying is that there are many small faces all over these bone spurs, and the facial features on the faces are all dense, dense and different.

Some of them look like a certain kind of beast, some of them look like human faces, and more of them are a kind of weird faces that exist at the same time as a human face and a beast face, which makes people feel numb in their scalps, and it is even more weird.

It was precisely because of the light in the aperture that the bodies of the three strange creatures all emitted white smoke, and the long red hair on the place where the light was illuminated showed signs of dissolving, gradually revealing the truth inside.

These faces all let out a sharp scream, and finally converged into that piercing scream, which reached the ears of Du Feng and Yunxi in the aperture.

Hearing these three piercing screams, Yunxi's face instantly turned white, and he fell within the aperture, clutching his head tightly, as if he was extremely painful.

And although Du Feng is much better than Yunxi, judging from the pain on his face, he has also been affected.

If this continues, the spirits of the two may be seriously injured or even killed by the screams of the three strange creatures.

But things soon took a turn for the better, after Yunxi swapped the black prismatic crystal, the energy in this crystal was not absorbed by half, but stopped when it was absorbed by a third.

At the same time, the already extremely bright aperture shone again, and the strange patterns on the ground showed a different form, and finally in Du Feng's "teleportation array" three words, the two disappeared in the aperture.

The lines on the ground also became dim after that, and finally completely disappeared into the ground, and the hall also returned to darkness, leaving a terrible scream to echo continuously.