"Senior Brother Yu, I wonder, didn't you say that the further this teleportation array goes, the more difficult it is to level up? Why do I feel that the further they go, the easier it is to level up?" Xinhai suddenly asked with a puzzled expression.

"Theoretically speaking, this is indeed the case, the more difficult it is to upgrade the formation, but these ghost cultivation teleportation arrays do make me quite puzzled, the speed of this upgrade is indeed a bit fast!" Cheng Yu was also puzzled by this, but he couldn't know everything, although he was very confused, he couldn't find the reason.

"Shouldn't these teleportation arrays be upgraded together?" Xinhe said.

"What does Senior Brother Xinhe mean by this?" asked Xinhai suspiciously.

"I mean, could these teleportation arrays be together, that is, once one formation is upgraded, the other formations will also be upgraded?"

"Is that okay?" said Kokomi.

"Is this possible?as long as their teleportation arrays use the same origin formation, then they can do this!" Cheng Yu nodded.

"What is the homology formation?" everyone said puzzled.

"As we all know, teleportation arrays have entry and exit, and generally speaking, one entry corresponds to one out. However, there are also some teleportation arrays that will be arranged with one entry and multiple exits, in order to distinguish the difference of each exit point, so each exit is different.

But now they have arranged all the formations in the same way, which means that their ghost cultivators don't need to distinguish whether they want to transmit from the Netherworld to the No. 1 Formation or the No. 2 Formation, they don't need to do this. They only need to teleport these ghost cultivators to the human realm equally, and it makes no difference at any point.

Therefore, this kind of teleportation array is called the same source teleportation array, and the characteristic of such a teleportation array is that it is like going out of the array, and it can teleport all the ghosts evenly over.

In addition, another feature of this kind of formation is that they are all connected, once one formation is upgraded, the other formations are also upgraded. Cheng Yu explained.

"I see, so since their formations are connected, can they teleport to each other?"

"Of course not, because entering the formation and going out of the formation are different, and what I said about the connection is only that the connection between their formations is the same, not that the formation is the same. They are all out of the formation, so naturally there is no way for them to spread from here to there, and there is no way to pass on the ghost cultivation over there to this side!

They can use this formation to upgrade the teleportation array as quickly as possible, and in this way, they can carry out a large number of ghost cultivation teleportations in a short period of time!" Cheng Yu shook his head and said.

"In this way, these guys are quite smart, with this kind of formation, each of their teleportation arrays is upgraded once, which is equivalent to upgrading seven levels at the same time, no wonder we feel that their teleportation array is upgrading faster and faster!" everyone suddenly realized.

"Their formations are not advanced, in fact, there are many formations that can teleport a large number of targets as soon as they are completed, and there is no need to be so troublesome!" Cheng Yu said.

"Then why didn't they build such a teleportation array, why bother to go up one level at a time, so troublesome?" everyone wondered.

"Maybe they don't have such a method of building a teleportation array!" Cheng Yu said.

When he was in the fairy world, he had seen a lot of teleportation arrays, and the fairy world was vast, and just a small city needed to use a teleportation array. Their teleportation array was able to directly transport a large number of battles, and there was no need for such trouble.

"Senior Brother Yu, since you know this thing so well, will you build a teleportation array? Otherwise, we won't have to be so troublesome, build a teleportation array in the Cheng family, and then build another one here, then we can keep going back and forth to the Death Forest.

Or directly connect a formation array back to the cultivation realm, then if the ghost cultivation army comes in from this death forest again, we can directly send troops from the cultivation realm, how convenient!" Xin Hai said with a smile.

"I thought, but unfortunately I won't, and the teleportation array isn't as easy to build as we thought. Come to think of it, when we were in Luminous City, we heard that there was a treasure light in it, and at that time, a teleportation array should have just been built.

It's been months since we've been here, but when we found them, the teleportation array was able to teleport two people, which means that this teleportation array is very difficult to build.

Moreover, they have spent so much time to build this kind of not very clever teleportation array, if we build a powerful teleportation array, it will not take a few years?

What's more, the teleportation array needs to consume energy, so they only build this kind of teleportation array, maybe a big reason is because the energy is not enough, you can see if you look at the Nether Crystal, it is not a particularly good thing at all.

If we can get a large number of immortal crystals, we can build some good teleportation arrays!" Cheng Yu said with a smile.

Joke, if the teleportation array is so easy to build, then isn't there a teleportation array everywhere in the cultivation realm? Moreover, he doesn't have any blueprints for building a teleportation array. So he only knew a little bit about the teleportation array, and it was almost impossible for him to build the teleportation array.

"How can we have immortal crystals in the human world? It's not the immortal realm!" Xinhai said disappointedly.

"That's true, only the Immortal Crystal can withstand a high-level teleportation array, so that a large number of teleportation warriors can be done as you said. Otherwise, the teleportation array built with the spirit crystals of our human realm can only be upgraded like them, so that the number of teleportations can slowly increase.

But even so, their teleportation array could not be upgraded indefinitely, because the Nether Crystal could not support a teleportation array that was too large. Cheng Yu said.

"Then how many ghost cultivators can this teleportation array teleport at most?" everyone asked curiously.

"I don't know about this, I haven't built it before, how do I know when this thing can be upgraded?" Cheng Yu shook his head and said.

"Then can we find the blueprints of their teleportation array and build the same teleportation array?" said Kokomi with some expectation.

"If there are drawings and spirit crystals, they should be able to be built. Cheng Yu nodded.

"Then why don't we arrest those ghost venerables and let them hand over the blueprints of the teleportation array? Maybe they want to hit our human world, we can hit him in the underworld first, wouldn't that be more refreshing?" Xinhai's eyes suddenly lit up, and he said excitedly.

"Who would want to go? You? Attacking the Netherworld doesn't do us any good, we just sacrifice more human monks if we fight it, what's the point?" Xinhe said angrily.

"How can it be meaningless? they want to beat us in the Netherworld, so we will destroy their nest first, so that we don't have to worry about being harassed by the Netherworld!" said Xinhai with a smile.

"The idea is good, but this possibility is relatively small, and you have to go to the underworld to set up a formation, will you go?" Cheng Yu said with a smile.