This Is My Secret, and I'm Not Telling

"Huff huff huff... Grandpa, why did you stop? I haven't reached my limit yet, I can still run!" Itachi asked, panting heavily.

Tianqi descended with Karura, put away the Truth-Seeking Orb, and said calmly, "I think it's enough to achieve the training objective. Reaching the limit can maximize strength, but without a strong physique, it can leave hidden injuries. Besides, you're not old enough to be desperately cultivating yet. Everything should be done slowly and gradually!"

"Grandpa, how strong does one's physical body need to be to avoid leaving any hidden injuries?"

"Hmm... how should I put it? Oh right, look closely at me!" As he spoke, Tianqi extended a finger, covered with Wind Release: Cutting: Chakra.

Just then, Tianqi instantly cut his palm with one finger, creating a five-centimeter wound. However, before any blood could flow out, the wound healed instantly, leaving not even a scar.

"Wow, what amazing self-repairing ability!" Itachi was also surprised by Tianqi's actions; he had never seen such a powerful healing ability before.

"If one's physical body can reach this level, there will basically be no hidden injuries left. However, obtaining such a body is not an easy thing!"

"Oh, so how exactly is it difficult for Grandpa?"

"This thing actually involves vitality, and this kind of powerful vitality physique is passed down from generation to generation by some special families. This physique, combined with special cultivation methods, can not only greatly enhance strength, but also allow one to acquire a physique like mine!"

After listening to his grandfather's words, Itachi thought for a moment and then said calmly, "According to what you said, grandfather, that kind of powerful life force is a special family inheritance. And since you were able to cultivate such a powerful physique, does that mean our Uchiha Clan also has this kind of powerful life force?"

"Very clever, but you're only half right. The Uchiha Clan doesn't have this special constitution. The clan with the strongest vitality is actually the Senju Clan. They have inherited the Sage Body for generations, and their vitality is extremely vigorous!"

"What is this 'Sage Body'?" Itachi asked, looking puzzled. He had never heard of this 'Sage Body' before.

"There are too many things involved in this to explain to you in a short time. Just know that this Sage Body is very powerful!" Tianqi shook his head and did not give any explanation.

The Sage Body involves too many things: the Sage of Six Paths, companions and love, Senjutsu Chakra, Sage Mode —it's endless to explain, so let's leave that for later.

"Oh, I see. But I still have a question. Based on what I know of you, Grandpa, as a pure Uchiha, you shouldn't have this kind of physique. So how did you manage to cultivate such a powerful body?"

Hearing Itachi's question, Karura nearby, also perked up her ears. She was also very interested in this. The Sage Body was inherited by her second Asura from their uncle Hagoromo, but her eldest brother Indra did not have this special physique. How Tianqi, as the descendant of his eldest brother Indra, obtained the Sage Body was a mystery.

"You silly girl, you ask too many questions. But since you asked, I might as well tell you. Actually, I didn't originally have this special constitution. However, everyone has their own opportunities, or you could say, fate. When I was a child, I encountered a chance that changed my life. It was because of this chance that I obtained the Sage Body and began to unleash the ultimate power of the Uchiha Clan. Perhaps it was all a mercy from heaven..."

Tianqi spoke with a face full of relief. This so-called opportunity was the system. It was because of the system that his life was changed. Without the system, he would not have the heaven-defying strength he has now.

"Oh, what kind of opportunity is this?" Itachi asked with a curious expression. An opportunity had changed his grandfather's life, and he was really curious about what kind of opportunity it was.

Karura nodded as well; she was also very curious about this opportunity with Tianqi.

"This..."

Tianqi hesitated before he could explain. With his current strength, he had no rivals in the Hokage world. It wouldn't hurt to tell Itachi about the system. However, he then thought of the two oddballs he had encountered in the time tunnel. Those two unfathomable guys were always a threat. Exposing the system now was clearly not a good time. For the time being, he couldn't reveal the system. It was better to keep a backup plan.

"What kind of opportunity it is is my secret. Can you not ask so many questions? I also need my own private space, okay?" Tianqi rolled his eyes at Itachi and Karura, but in the end, he didn't reveal the secret about the system.

"Tch, he didn't say anything after all that. Itachi, let's go and ignore him!" Seeing that Tianqi still couldn't get anything out of him, Karura simply grabbed Itachi and strode away.

Watching the two leave, Tianqi shook his head helplessly. How could it be so easy to find out his secret?

Tianqi then followed in their footsteps, heading towards Tsunade's location.

Normally, this journey would only take a few days, but because they needed to teach Itachi, the three of them spent half a month without reaching their destination.

In the past two weeks, from simple running to Chakra usage and finally to the release of Ninjutsu, Tianqi witnessed his genius grandson's talent. He could learn anything at a glance, and he could easily master C-rank and B-rank Fire Release Ninjutsu. If it weren't for the lack of Chakra, even A-Rank Ninjutsu would be no challenge for him.

Seeing Itachi's incredible talent, Tianqi's affection for his grandson grew even stronger. He was sensible, intelligent, and incredibly talented—truly his perfect successor.

Karura flew in mid-air, watching the weasel leaping through the forest below, and said to Tianqi beside him, "Little Weasel's talent is truly remarkable. Now I finally understand why you brought him along; you want to train him to be your successor, right?"

"You could say it's right or wrong. Actually, the reason I initially wanted to take Itachi away was because of it!" As he spoke, Tianqi also took out a pair of eyes from the Kamui Dimension.

"These eyes are!!!"

Karura's eyes widened as he looked at the eye in Tianqi's hand, because he sensed a familiar aura emanating from it, an aura that belonged none other than his elder brother Indra.

"Yes, these eyes belong to Indra. He entrusted them to me before his death, asking me to give them to someone truly suited for them, and to find a successor for them!"