"Grandpa, can I bring the ten thousand giants I've controlled into my sub-world?" Zhou Hong asked in his mind.
"Yes, because their realms are lower than yours, it's completely fine."
"That's good, I have a big idea now." Zhou Hong chuckled.
"What idea?"
"Do you have anything like sword formations?"
"Hmm, speaking of sword formations, I do recall a very powerful one called the Immortal Slaying Formation. This Immortal Slaying Formation is incredibly potent. In the Immortal Realm, it's often used as a sect's defensive array. However, it requires a large number of people, and each person must cooperate flawlessly. Therefore, it's very difficult for most people to master."
"Immortal Slaying Formation? Grandpa, how many people does this Immortal Slaying Formation require?"
"Because its power is immense, it needs at least a hundred thousand people. In the Immortal Realm, some sects train their disciples in this sword formation. Once enemies attack, the sect's hundred thousand disciples can quickly form the Immortal Slaying Formation. Even though they are just weak disciples, they can provide a powerful defensive force. However, achieving perfect cooperation among a hundred thousand people is incredibly difficult. No matter which sect it is, they can only utilize thirty to forty percent of its power."
"That's great! I was planning to control some giants and then train them into a powerful formation. Since I control every giant, perfect cooperation is completely achievable. Furthermore, I can bring the hundred thousand giants into my sub-world. From now on, wherever I go, I can use this as a formidable weapon," Zhou Hong said excitedly.
"Yes, this is precisely your advantage. Having a sub-world is equivalent to carrying an Immortal Slaying Formation with you at all times. And with your sub-world as a foundation, you can control a hundred thousand people simultaneously. For anyone else, even an immortal, using soul control on a hundred thousand people at once would be very difficult."
"Mm-hmm, then I'll go and control ninety thousand more giants and bring them into my sub-world to practice the Immortal Slaying Formation."
"Go ahead, Grandpa supports you. If you can master the Immortal Slaying Formation, I believe even giants in the Mahayana stage might not be able to break through your Immortal Slaying Formation. Moreover, the Immortal Slaying Formation can be used as both a defensive and an offensive formation."
"Then I'll control a hundred thousand giants first."
However, Zhou Hong's grandfather frowned and said, "But there is a downside."
"What downside?"
"Once the Immortal Slaying Formation is deployed, others will see that you are carrying a hundred thousand giants. This is not something an ordinary storage space can hold. Thus, the secret of your sub-world will be revealed." Zhou Hong's grandfather was somewhat worried.
"So what if they know?"
"You foolish child, if people find out, especially immortals, they might plot against you, kill you, and seize your sub-world."
"Can sub-worlds be taken away?"
"Of course. Even if they can't match it, it's enough for them to use as a storage space."
Zhou Hong sighed helplessly, "Then should I still go and control a hundred thousand giants?"
"You must. However, don't deploy it lightly in the future. Once you deploy it, you must take the enemy's life."
"Mm-hmm."
Afterward, Zhou Hong went to other territories and, using the same method, employed soul control on the strongest giants in each territory, then brought them into his sub-world.
Thus, time passed. Months, perhaps three or six, or even longer, went by.
Zhou Hong finally gathered a hundred thousand giants. The strength of these hundred thousand giants was all at the Spirit Severing stage.
Zhou Hong entered his sub-world. Within his sub-world, Zhou Hong allocated an area for these hundred thousand giants to reside. Although Zhou Hong controlled them, they still had their own thoughts when he wasn't actively controlling them, and they needed to live.
At this moment, all one hundred thousand giants were utterly bewildered. Some had entered the sub-world months ago, while others had just entered.
Of course, they had no idea where they were. They only knew it was a different world, and the spiritual energy in this world was extremely thin, with no immortal energy whatsoever. They all felt like fish caught from the ocean and kept in a pond, extremely unaccustomed to it. Yet, despite their discomfort and their attempts to escape Zhou Hong's sub-world, they were completely helpless.
"Why, why is this happening? Why am I in this place?"
"Where is this, God, tell me, where is this?"
"Ahhh, I want to go home."
In the area Zhou Hong had designated in his sub-world, the hundred thousand giants were crying, roaring, all looking utterly helpless.
Even though outside, Zhou Hong was no match for them, and individually, Zhou Hong was not their opponent, here, in Zhou Hong's sub-world, they were like ants, at Zhou Hong's mercy.
"Everyone, be quiet, please be quiet." Zhou Hong appeared in mid-air. The hundred thousand noisy giants all looked up.
For ease of communication, Zhou Hong also enlarged his body to be as colossal as theirs.
"Who are you?" The hundred thousand giants roared, some even wanting to charge at Zhou Hong. However, before they could even leap, a powerful force pinned them firmly to the ground.
"Esteemed giants, this is my sub-world. As for who I am, it's simple; I am from the Tianyang Continent," Zhou Hong said with a laugh.
"Tianyang Continent?" The hundred thousand giants seemed to know. Beneath the Deep Sky Continent, there was another continent inhabited by the humble human race.
"That's right. You have all been subjected to my soul control and brought into my sub-world."
"Let us out, you lowly human."
Zhou Hong snorted, and with a thought, countless giants' bodies floated into the air, their necks constricting as if being choked.
Seeing Zhou Hong's immense power, the giants were terrified and dared not speak further.
"To anyone who continues to grumble, I will not hesitate to eliminate them. There are plenty of giants outside, and I can always bring in a few more," Zhou Hong said coldly.
"What exactly do you want?"
"I don't want anything. I just want to gather a hundred thousand giants to set up the Immortal Slaying Formation. From now on, you will live out your remaining years in my sub-world until you die."
"I don't…!" All the giants roared, unable to accept this.
Zhou Hong gave them no choice and immediately controlled the hundred thousand giants to begin practicing the Immortal Slaying Formation.