Time passes, and Dan continues his daily program of training. Every morning, the same routine: physical exercises, diving into the depths, training under immense pressure, refining chakra, and developing techniques. He didn't stop, didn't slacken, and didn't slow down. Sometimes he checks on his infants, carrying them for a few minutes when he finishes his daily training program. Although he enjoys these moments, Dan won't let it affect him or cause him to relax. On the contrary, Dan became more careful not to let emotion distract his focus from his goals.
Because his goal becomes clearer the more he trains, becoming more stable and unwavering: power to protect himself first, then his family, and immortality, which is the most important. These were the two goals he lived for since he moved to this world. Especially now, with his family and children, the goal became more important. Because he knows, from his knowledge of watching anime, that this world is very dangerous.
He was thinking about that a lot lately. The dangers in this world were not ordinary. There are the dangerous Otsutsuki, the alien beings that eat planets, steal chakra, and destroy civilizations with massive cosmic power levels that can destroy worlds. And there are the sons of Kaguya—Hamura and Hagoromo, the Sage of Six Paths himself, who lived in his village years ago. And their heirs who inaugurated the current era of wars. The mentally disturbed Uchiha clan with their crazy eyes, massive power, and endless psychological illnesses. The Senju clan with their terrifying physical strength and ability to control vital energy. And the wars that will come—endless wars between villages and clans, bloody conflicts that will last for centuries.
There was also Black Zetsu, Kaguya's son lurking in the dark, working for centuries, planning and manipulating, all for one goal: reviving his mother. And there was Isshiki Otsutsuki, who came with Kaguya to Earth, but she betrayed him and attacked him, and he is trying to recover now somewhere, regaining his strength and planning his return. The world is truly very dangerous, full of monsters, aliens, and madmen.
Dan has set his foot on the path of longevity and power, but he is still at the beginning. If he estimates his current strength, he believes he is at the peak of the Kage level, but definitely less than the level of Hashirama and Madara. His physical strength is massive, his chakra reserve is large, and his control is superhuman. But he has not yet reached the level of true monsters. He has not yet reached the level of Hashirama Senju or Madara Uchiha—those monsters who can destroy mountains and change the geography of regions with their battles.
Therefore, he must not be deceived. He must keep himself hidden, far from sight. He must grow his strength steadily, patiently, and without haste. He must develop the Vitality Seal further to increase his age and give himself more time. Dan also realizes that he is not a traditional ninja like those who follow the path of power in this world. His path was different. His techniques and arts are different from the ways of the ninja. He developed his own style based on his knowledge from anime, his experiences, and his creativity. Deadly threads, silent movement, the Web, and the Vitality Seal—all these are unique techniques of his own invention, different from any other ninja's moves in the anime, at least according to his own knowledge.
His training is also different: training underwater, Swedish military exercises, and focusing on precise control instead of massive techniques. It was a completely different approach. To Dan, the ninjas who would appear later in this world were like a mixture of ninja arts and magic—techniques that defy logic, create fires from nowhere, control reality, and summon giant monsters. Especially as their techniques evolve and after they build villages of mercenaries and thugs—the Hidden Ninja Villages, which will become war machines, hired killers, and tools for rulers and nobles.
Dan wanted none of that, neither for himself nor his family. He didn't want to get involved in politics, wars, or meaningless conflicts. All he wanted was to live in peace, in his isolation, away from troubles, developing his strength quietly, protecting his family, and seeking immortality. Therefore, recently, a new idea occurred to him. While researching the art of the Vitality Seal and developing techniques, he began thinking about protecting his area. What if troubles came to him? What if someone discovered his existence and came to attack him or harm his family? He needs an extra layer of protection.
So, he started thinking about developing a Barrier Seal technique—a large, strong barrier surrounding his entire area. A barrier that prevents unauthorized entry, warns him of any intruder, and perhaps even attacks infiltrators automatically. The idea is very ambitious and complex, but it seemed necessary, especially with the expansion of his family in the future. The problem is that he didn't know where to start yet. Barriers were very advanced techniques, requiring deep knowledge of seals, chakra flow, and spatial engineering. He had no reference; there was no one to teach him. He has to discover everything himself from scratch.
But Dan did not despair and decided to dedicate time to research in this direction every evening after training ends, in his lab. Studying, thinking, experimenting, and drawing diagrams. He tried to understand how barriers work, how they are created, and how they are sustained. The process will be slow and sometimes frustrating, but Dan is patient and possesses the will.
As for the improved version of the Vitality Seal, he finished it some time ago. it took months of precise work, experiments, and adjustments. But now he is satisfied with the result. The improved seal is ready for application, but he decided to wait a little and postpone the matter. He was waiting for the birth of the next three children. He wants to be present and ready to help his wives if labor comes suddenly. After they all give birth and things settle, then he will focus on applying the improved seal.
The improved seal involves two main steps: First, spreading the seal throughout all his muscles to nourish them directly with chakra. This will significantly increase his physical strength, recovery speed, and endurance. Second, sealing the chakra leakage from the body. He will block all natural outlets from which chakra leaks, except those he allows himself. This will make him more efficient in using chakra and allow him to retain his full energy. Also, it will make it almost impossible for anyone to sense his chakra; he will become nearly invisible to sensing techniques—a ghost that cannot be tracked.
These are massive upgrades that will significantly increase his power and safety. But the application was very complex and also dangerous. He will need a very high amount of focus while working on it. Therefore, he wants to wait until things settle with the birth of the children. Dan sat in his lab, looking at his notes on barriers. He had drawn a simple diagram of his area: the houses, the barns, and the hole. He tries to think how he can surround all this with a barrier. How many seals will he need? Where should they be placed? How to link them together? The questions are many, and the answers are few.
He looked through the window at the quiet camp. His women and children are deep in their sleep. Everything seems peaceful. But Dan knows this peace is only in his isolated place. In the outside world, things are moving. The conflict between Indra and Ashura had almost started in this era, or was about to start. Clans will form, and ninjas are increasing in number. One day, chaos might reach here. One day, he might need to protect his family from real dangers. And so, he is preparing: building his strength, developing his protection, and planning for the future.
"Caution," he whispered to himself. "Caution and patience. This is my path to survival." He closed his notes and stood up. In a week or two, the second wave of births will begin. Then, he will apply the improved Vitality Seal. After that, he will work on the barrier. Step by step, steadily, and cautiously—that is how he will reach his goal.