The three of Ningxi entered the castle, and there was a room inside the door.

There are two sand table-like things in the room, on which are placed some flags and stone statues of the size of a finger.

"What is this? It looks like a sand table between two armies, but it doesn't look like it." Ning Xi looked at the two sand tables curiously.

Luo Yinhuang looked at the two sand tables carefully, pondered for a moment, and said, "This should be a kind of chessboard. These stone statues are controlled by the flags, like a chessboard for two people to play against each other."

"Is this a battle between two chessboards, or a battle with other chessboards?" Ning Xi also saw some ways.

Luo Yinhuang approached, saw an empty recessed position on the two sand tables, and immediately threw the two array disks.

The array plate flew up spontaneously, and was embedded in two recessed positions.

Then a reflection sand table appeared on the wall, which also had flags and stone statues on it.

"It seems that we need to use the chessboard on these two sand tables to defeat the one reflected on the wall before we can move on." Luo Yinhuang said with great interest.

Ning Xi also showed interest, she is now learning the formation technique, "Let's try it! If there is something you don't understand, teach me!"

Luo Yinhuang smiled and nodded: "Okay!"

Jing Yi only knew how to refine weapons and was not good at formation, so he retreated to the door and sat cross-legged, helping the two guard while comprehending the experience of fighting the rock giant before.

The things on these two sand tables do not need to be controlled by profound strength and spiritual sense, and instead of the two, they can be used to control the stone statues on the array flag to fight.

Soon Ning Xi and Luo Yinhuang put their hearts into it.

Ning Xi would encounter a bottleneck from time to time, so he asked Luo Yinhuang. After getting a detailed and concise explanation, he quickly understood, and absorbed the knowledge of the formation very quickly.

At the beginning, because Ningxi's side had a big flaw in the formation, he lost ten games in ten games, but each time he persisted for a longer time.

Time flies, and half a month flies by in a blink of an eye.

There was a rumbling sound in the castle room, and the sand table reflected on the wall completely collapsed and disappeared.

Ning Xi smiled, "Through this kind of sand table battle, my array spells have improved rapidly!"

The ancient monk who invented this kind of chessboard battle to improve the ability of the formation is really wise.

Luo Yinhuang smiled slightly: "Well, I also learned a lot of new things."

After the sand table on the wall collapsed, the door to the room opened.

The three walked in and saw three more advanced rock giants guarding the inner door again, and they had to defeat them if they wanted to get in.

So the three started a new round of first being ravaged and finally fighting back.

The three of them have rapidly improved their strength after such a test, and they have almost reached the realm of self-absorption, and the people outside are anxious to death.

Yan Wushuang and the others found two underground caves under the snowy mountains. Everyone went in and searched, but except for the vast underground magma river, they found no signs of survival of the four of Ning Xi.

After searching for more than half a month, everyone has a bad feeling in their hearts.

"Could it be that Luo Di, who is known as the first genius of the Four Kingdoms, would have fallen in such a small place as the Kunlun Secret Realm?" Di Qingyan said in disbelief.

Jun Jiuli's face was pale and complex, "Maybe we just didn't find it."

"That black-hearted and black-hearted Luo Di won't die so easily, not to mention that there is an even darker Ning Xi by his side. They say that the scourge will last a thousand years." Yan Wushuang still held a glimmer of hope.