After Xuanxuan learned about the relationship between the Most Ancient Cave and the Heart Demon Realm, she also realized one thing.

Everything in the world is mutually reinforcing, even if it is the inner demon that is feared and hated by the monks, there is a reason for existence, and the inner demon world has its own reason for existence.

Between heaven and earth, the lonely yin does not grow, the lonely yang does not grow, everything has two sides. With the vigorous development of the heavens and all worlds, while beauty and light shine in all directions, there will also be darkness.

Even if there is no First Heavenly Dao to create the Heart Demon Realm, under the continuous development of the Heavens and Ten Thousand Realms, the endless negative energy will still give birth to a new Heart Demon Realm.

The Heart Demon Realm transformed from the Most Ancient Cave just advanced this process, and it was also a special world that was controllable and recognized by the Heavenly Dao. If you don't create a Heart Demon Realm first, and wait for the Heart Demon Realm to take shape naturally, then the situation will be uncontrollable.

Who knows what the inner demon world will look like at that time, and will it be reorganized by an explosion at two ends in three days? Well, quite possibly, after all, can you expect a rabble of negative energy to build up a solid and immortal world?

Even if you can make it, I am afraid that it will be found by powerful monks, and then it will be served in a pot, and then it will continue to take shape and continue to be destroyed...... It's even bad that there will be a common end, and then the unlucky ones will still be the ordinary people who have not cultivated.

"Okay, the Heart Demon Realm really can't move, but it doesn't prevent me from making some snacks." Xuanxuan thought about it and breathed a sigh of relief.

Anyway, as long as the creatures of the heavens and all worlds are immortal, then there will always be a squeeze, and there is no need to worry about whether it will be eaten or not.

"Looking at your state, it seems that you know the information of the most ancient cave, where is it?" Through the light of the Heavenly Dao, Wuji Zun saw Xuanxuan's expression and hurriedly asked.

"......" Xuan Xuan stared at Wuji Zun for a while before she said, "Before you answer, can you tell me what kind of species you are?" ”

"Me? Ha, am I not a demon, an out-and-out demon! Wuji Venerable stood up, crossed his waist, and looked proud and complacent.

"Your name...... Wrong. The top surname in the heart demon world is 'Tianxia', followed by 'heart demon', 'heart', and 'demon'. Xuanxuan said.

"Oh, that's the name I gave myself, and I still have student number 404." Wuji Zun didn't feel that there was anything wrong with it, "There's no one who can't name themselves themselves, right?" I just don't like numeric names, they don't feel like they're called. ”

“404？” Xuanxuan didn't react yet, Xiao Si, who was shrunk into a trembling ball in her body, was suddenly stunned, and then exclaimed incredibly, "Isn't it, the three-digit demon with the number of students?" How long ago is this an old antique, the same era as the third in the world, right? ”

"As far as I know, the student number has only become an integer since the third in the world, and before that, the student number was a few points, a few points at two points, and a few points at three points......"

Wujizun heard Xiao Si's voice and nodded, "Well, you're right, although I've been sleeping, I have indeed experienced the change of the student number, when I first started, the student number was 1.1, and then the student number changed all the ungraduated demons to return to the heart demon pool, I slept for a while, and after I came out, my student number became 404." ”

Xuanxuan: "......"

Xiao Si was stunned, what is this Mani talking about? Student ID 1.1? If I'm not mistaken, before the change of student number, the first student number was 1.1.

"Wait, you said you entered the Inner Demon Pool? Still sleeping? This is impossible, the heart demon who entered the heart demon pool, and then came out is a new heart demon, and the memories of the past are all gone, this is the deletion number! ”

Wuji Zun said with deep feelings: "That's right, it's indeed a deleted number, no, my original student number was deleted, and I changed it to a 404 student number, I always feel that this student number is not very good, there is no 123 smooth, and there is no separate 1 to be simple, alas, who let me oversleep it." ”

Xiao Si shouted: "No, no, no, deletion means deleting everything in your past, completely deleting!" Now that it's deleted, how can it still leave a memory? ”

"Well, I can't answer this question either, anyway, the Heart Demon Pool won't wash away my memory, it will only wash away my student number. Oh, by the way, I came up with an explanation, it's like a game in the mortal world, where players can delete their numbers and start over, but their memories are not deleted, only the data of the game characters is deleted...... What about this explanation? Makes sense. ”

Little four: "......"

Reasonable hammer! Are you here to play games? Can life be deleted and restarted? Is there a regret pill in the world? Ah, ah~~~~

Xuanxuan thought thoughtfully, chose to think about his words, and said, "You are really special, maybe it has something to do with the first day of the Dao." ”

"Huh...... Hey, don't tell me, in fact, I'm the first day of the Dao? Wuji Zun looked shocked, how could this be, he was a demon in his heart, could it be the first day of the Dao?

Why wasn't he impressed at all? It's not going to be amnesia, is it? Isn't this a dog? TV series, he is just a little sleepy and has absolutely no amnesia, which can be guaranteed!

Xuanxuan said faintly: "I didn't say it. Don't you want to know the oldest cave? Then I'll tell you, the most ancient cave is the predecessor of the Inner Demon Realm, now you understand, right? ”

Hearing this, Wuji Zun's eyes widened, and he had a sense of surprise, but after thinking about it carefully, he felt that it was reasonable.

It doesn't seem to be a problem.