Not far from the nine-tailed dragon sunflower, there was a cave, and the four of them went in to investigate, and found that this was the cave of the thunderbolt manta dragon.

This cave is big and strong, and Shangguan Yunqi's Blazing Thunder Peng Bird is very safe to advance here!

Su Yingxue said to the Blazing Thunder Peng Bird: "You will shrink your body first, and we will put a formation on the side to protect you, and you will refine this beast crystal!" ”

The Blazing Thunder Peng Bird is a seventh-order subversive demonic beast, only one level away from the level of the divine beast, and the crystal nucleus of this fierce beast really appeared at this time.

"Roar~!"

The Blazing Thunder Peng Bird chirped, and very obediently shrunk its huge body to only two or three meters in size!

The four of them sat down cross-legged, divided into four directions: east, west, south, and north, and surrounded the Blazing Thunder Peng Bird in the middle!

Shangguan Yunqi summoned the beast crystal of the Thunderbolt Bat Dragon from space, held it in his hand, and said to the Blazing Thunder Peng Bird: "Let's set up the formation first, in order to prevent accidents, you will swallow this crystal nucleus after the formation is completed!" ”

"Roar——!

The Blazing Thunder Peng Bird raised its head and chirped, indicating that it understood, and Shangguan Yunqi put the crystal nucleus in front of it.

Retreat to their positions, and the four of them began to set up!

In fact, their formation is just some defensive formations, just to isolate some sounds and resist mutations!

The four of them also closed their eyes slightly, making the same gestures, and in mid-air, the four spiritual powers converged together to form a semicircle, enveloping the Blazing Thunder Peng Bird.

It wasn't until the moment the formation was completed that the Blazing Thunder Peng Bird lowered its head slightly, only to see its beak pick up the fierce beast and swallow it......

The moment it swallowed, it let out a long roar, and then its body suddenly brightened, and the light it emitted hit the magic circle that the four of them had set up together!

The four friends injected spiritual power into this protective barrier, and at the same time, Murong Lin also injected his gold element into it, just to strengthen this defense!

Time passed bit by bit, the four of them looked a little pale, because the spiritual power in their bodies was lost too quickly, there was already a cold sweat on their foreheads, Situ Aoxuan wanted to use spiritual power to supplement the formation, and on the other hand, he also had to use gold elements to strengthen the defense, but he was not light!

But fortunately, in the process of gritting their teeth and persevering, the mood of the Blazing Thunder Peng Bird in the formation gradually stabilized, and it seemed that it was already refining this beast crystal.

As soon as the Blazing Thunder Peng Bird was quiet, they didn't need to input so much spiritual power, and the bodies of the four people loosened at the same time, while slowly recovering their physical spiritual power, they continued to pour spiritual power into the formation!

As time passed, before they knew it, they had maintained this position here for more than three days, and now it was the evening of the fourth day, and it had been ten days since they entered this mountain forest!

During the time when the Blazing Thunder Peng Bird was practicing the beast core, the little fox sable came out of the Ring Space and fed them some of the fairy water in the space.

It was because of the supply of immortal water (jǐ) that the few of them would not be so tired that they would collapse and die......

The fourth day had just fallen into the night, and the entire formation was constantly shaking, as if it was about to collapse.

The vibration of the formation was too strong, and it consumed their spiritual power and elements very much!

Suddenly, the sky outside the cave darkened suddenly, dark clouds covered the sky and the sun, and he couldn't see his five fingers, and in an instant, a powerful coercion hovered over the cave, making the nearby demonic beasts dare not approach this cave, shaking their bodies and fleeing quickly......