After Huang Tian reappeared, Bibi Dong impatiently asked, "Husband, what is the World Membrane? Why are you so nervous?"
"Our world is merely a Small World. Each world may be only a single planet, or perhaps a complete galaxy containing planets, satellites, asteroids, comets, and stars. Every world is wrapped in a transparent film resembling a bubble. I call this film the World Membrane. It isolates and protects the world. Experts from other worlds, if they wish to enter our world, must pass through the World Membrane. Its defensive power is extremely strong and can withstand attacks from First-level Gods.
"However, the World Membrane is not without flaws. There are some naturally formed openings whose locations drift unpredictably. Even experts would need considerable time to search for them. Thus, some Outer Realm Experts who wish to invade will launch probing attacks from outside the World Membrane, searching for those openings and hoping to sneak in directly.
"A month ago, as my strength increased further, my Black Hole Martial Soul sensed the existence of the World Membrane. I had been studying it whenever I had spare time, and from time to time, I sensed unknown energy outside the World Membrane attempting to attack it. I guessed that they were likely probing for the locations of those openings, intending to slip in when the chance arose.
"The reason I was so nervous just now was that the Black Hole Martial Soul sensed several extremely powerful energies attacking the World Membrane, and I devoured them. After investigating, I found no trace of any experts within fifty million kilometers outside the World Membrane. They must be hiding very deeply, so I could not detect their locations. Or perhaps their strength far surpasses mine.
"If their strength greatly surpasses mine, yet they are still probing