When Huang Tian reappeared, Bibi Dong couldn't wait to ask, "Husband, what is a boundary membrane? Why are you so nervous?"
"Our world is just a small world. Each world may be just a planet, or it may be a complete galaxy including planets, satellites, asteroids, comets, and stars. Moreover, each world is wrapped in a transparent film similar to a bubble. I call this film a boundary membrane. It can isolate and protect the world. The strong from other worlds may want to travel to our world, after all, they have to pass through the boundary membrane. However, the defense ability of the boundary membrane is also very strong, and it can withstand the attack of a first-level god.
However, the boundary membrane is not without loopholes. There are some naturally formed doorways whose locations are erratic. Even for strong people, it will take a lot of time to search. Therefore, some strong outsiders who want to invade will launch tentative attacks outside the boundary membrane, looking for those doorways, and try to sneak in directly.
A month ago, as my strength continued to improve, my black hole black soul sensed the existence of the boundary membrane. I have been studying it in my spare time, and from time to time I sensed that there was an unknown energy outside the boundary membrane trying to attack the boundary membrane. I guessed that it was very likely that the other party was testing the location of the doorway on the boundary membrane and wanted to take the opportunity to sneak in.
I was so nervous just now because the Black Hole Martial Spirit sensed several very powerful energies attacking the boundary membrane, which were swallowed by me. After investigation, no trace of any strong people was found within 50 million kilometers outside the boundary membrane. They must have been hiding very deeply, and I was unable to detect their position, or their strength was far above mine.
If they are so much stronger than me and are still so cautious in their attempts, it's likely they're wary of our divine realm. Our world must be a subordinate plane of the divine realm, and they won't just sit back and watch us get invaded. We'd be in big trouble if a powerful outsider found the door and sneaked in. How many of us would be able to stop them? It would only lead to devastation and bloodshed."
Huang Tian worriedly recounted the whole story and his speculations, leaving Bibi Dong feeling a wave of resentment. Even the powerful Huang Tian felt a pang of fear, so how terrifying would the invading aliens be? Would it be just one person or a whole group? No wonder Huang Tian agreed so readily to my request; it turned out he hoped his side would become even stronger, ready to stand up against powerful enemies in the future.
"While the powerful enemies from outside the domain haven't arrived yet, let's practice hard to improve our strength! Husband, time cannot be wasted, let's seize the time to practice dual cultivation." Bibi Dong bit her red lips lightly, looking at Huang Tian with spring in her eyes, as if she was ready for him to pick her.
"Well, Dong'er, the night is short, I'm coming."
......
Huang Tian rarely practiced in Bibi Dong's secret room. After the two of them practiced together last night, his strength had increased a little. He practiced now to digest the energy in the black hole field. After more than ten hours of restraint and suppression, the energy was no longer violent, but extremely docile. Huang Tian controlled the black hole martial spirit to devour and absorb, quickly transforming it into divine power to enhance his strength.
"Hu." Huang Tian exhaled a breath of mixed air. After absorbing those energies, his divine power was enhanced a little, but it was not as strong as the strength he had improved in the past two days. However, now, every bit of improvement counts, and he could be promoted to a first-level god sooner. Even if he could not defeat the invaders, he could still take a few women and his men to hide in the realm of gods, and let the strong people in the realm of gods come forward to deal with the invaders.
But now, I should improve the strength of my subordinates, make them stronger, and hope that more of them can survive in future wars.
Thinking of this, Huang Tian teleported to Shura Valley to improve the strength of his men.
In the Pope's Palace, Bibi Dong called Hu Liena over and said with a smile, "Nana, how are you and your senior sister getting along?"
"Teacher, my senior sister looks a bit aloof, but she is actually a very nice person. She was very warm to me and even gave me some guidance on my cultivation last night." Hu Liena said with a smile.
"Very good, as long as you sisters get along well with each other. Your sister is not in Wuhun City all year round, so she must be unfamiliar with the current Wuhun City. You should take her out to play more often without affecting your cultivation." Bibi Dong nodded with satisfaction and said with a smile.
"Please rest assured, teacher, I will." Hu Liena patted her chest and assured Bibi Dong.
"Well, this is a magical herb. Take it to increase your strength. Otherwise, with your current strength, you'll lose miserably in the finals." Bibi Dong took out the magical herb that Huang Tian had given her last night from her spatial soul guide and handed it to Hu Liena. She continued, "I'll teach you a better cultivation method. With this magical herb, you'll be able to reach Soul Sage status before the finals."
"Soul Saint? Teacher, you are not kidding, are you?" Hu Liena took the magic herb and said in shock.
Bibi Dong shook her head and said, "Are you kidding? I never joke. Come with me to the secret room and you'll know after practicing." After that, she pulled Hu Liena to another secret room.
In the secret room, under Bibi Dong's supervision, Hu Liena first ate the magic herb, and then she felt her soul power growing rapidly, from level 57, level 58, level 59 to level 60, before it stopped growing. However, she could feel that there was still extremely strong medicinal power in her body that had not been completely absorbed by her.
"Teacher, I'm already level 60." Hu Liena opened her eyes and said happily.
"Well, I'm watching. I'm going to teach you a new cultivation technique called the Nine Heavens Mysterious Art. I got it in exchange from a powerful person. Don't move, just sit still. I'll teach you the exercises for this technique. This technique cultivates both soul power and spirit strength, and also helps cultivate the body. You'll be practicing this technique from now on."
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