Uchiha Sasuke was already impatient to gain power, even at the cost of sacrificing his future.

Chiba formed a hand seal and placed his hands on the ground, summoning a snake with a pure white body but covered in black curse marks.

"Next, this snake will apply the Heavenly Curse Seal to you. The Heavenly Curse Seal involves a special Chakra called Senjutsu Chakra, which I won't elaborate on for now, as this isn't the right place to explain it to you. Regarding Senjutsu Chakra, you can ask Kakashi later if you want to know more; he will answer you.

In short, after the curse mark transformation, your Chakra, strength, and speed will increase exponentially. It's one of the most direct ways to boost your power. However, the Heavenly Curse Seal applied by this snake is only the first stage. To enter the second stage, my teacher Orochimaru needs to inject the curse mark into you a second time, which will allow you to transition to the second state.

The process will be a bit painful, so let this snake follow you home. When you're ready, just let him bite your neck and inject the curse mark."

The snake summoned by Chiba coiled around Uchiha Sasuke's body and hid itself.

Uchiha Sasuke nodded, then asked, "Can I learn your Lightning Breathing Full Form?"

Chiba smiled and said, "Of course you can. The Lightning Breathing Full Form I gave to Konoha is actually complete; it just lacks one crucial prerequisite. You can ask Kakashi; I'll inform him beforehand, and he will teach it to you without reservation.

If you are still not satisfied with your current power later, you can come to Hidden Sound Village to find me. I will ask Teacher Orochimaru to inject the curse mark into you a second time, making your Heavenly Curse Seal complete, or I can teach you anything else you want to learn.

After all, you've already exchanged your future with me, so I won't be stingy with you.

However, there's one thing I need to make clear to you beforehand: we are merely partners in a transaction, not in any close relationship like master and disciple. So, if you want my help, you must offer a reward that interests me.

Also, you are currently overdrawing my reward, so when you grow stronger in the future, if I need you to do something, you must do it. You have no right to refuse. Do you understand?"

Uchiha Sasuke replied, "I understand."

"Alright, then you can go back and prepare."

Uchiha Sasuke disappeared into the moonlight.

After Uchiha Sasuke left, Chiba went to Kakashi's house and found Kakashi.

Chiba told Kakashi about Uchiha Sasuke's situation.

Kakashi was very surprised: "He's really bold. Knowing your identity, he still dared to seek you out and even sold his future to you."

Chiba chuckled, "To be honest, I was a bit surprised at first, but then I understood. He is completely consumed by thoughts of revenge now, seeing revenge as his sole purpose. Naruto is also part of the reason.

Because Naruto is so much stronger than him now, he, who was once the top student in the Ninja Academy, has been far surpassed by Naruto, whom he considered mediocre. Therefore, he is very jealous of Naruto now. I imagine he was very impatient when you were teaching him, wasn't he?"

Kakashi nodded, "He was indeed very impatient, as if he was in a great hurry."

Chiba continued, "That's right. The gap with Naruto caused him to fall into self-doubt, feeling that if he couldn't even catch up to Naruto, how could he kill Uchiha Itachi? In this state of mind, his desire for power has surpassed everything.

So, even though I am an enemy of the Uchiha clan, he still chose to come to me, because compared to others, I am the person most likely to make him stronger in a short time."

Kakashi agreed with Chiba's statement. Indeed, he often saw the unwilling look in Uchiha Sasuke's eyes when he looked at Naruto Uzumaki.

Kakashi asked, "So, can I teach him Lightning Breathing now, right?"

Chiba replied, "Yes, since he has made such a choice, then teach him. Sasuke also holds a very important position in my future plans. Also, one more thing, Teacher Orochimaru has found a way to solve the issues with your Sharingan.

After this plan is over, observe the situation in Konoha. If it's not suitable to stay in Konoha, then leave and return to Hidden Sound Village. Let Teacher Orochimaru resolve the drawbacks of your eyes, and it's also time for you to go to Ryūchi Cave to learn Sage Art.

Sage Art is the admission ticket. Future battles will require the assistance of Sage Art. Without Sage Art, you won't have the initiative in battle and will fall into a passive state."

Kakashi agreed, "I understand. I'll assess the situation then. If Konoha is no longer suitable to stay in, I will leave for Hidden Sound Village."

"Alright, I'm leaving... Oh, here, take this."

Chiba tossed the Icha Icha Paradise he got from Jiraiya to Kakashi.

Kakashi's eyes lit up when he saw the book in his hand.

Chiba couldn't help but complain, "Read less of these kinds of books. I really don't understand what's so good about them. You should find a girlfriend soon; you're 26 years old and still reading these books. Oh, by the way, that girl from Kagizaki Village is quite nice, Hana Ling, right? Haven't you thought about developing something? If you like her, I can..."

Kakashi said helplessly, "Teacher! When did you become so long-winded? And how did you know about her?"

The Hana Ling Chiba referred to was a female Ninja from Kagizaki Village in the Land of Locks, who had been captured by Konoha earlier.

Hana Ling disguised herself as a singer to perform in Konoha and deliberately allowed herself to be captured by the Anbu. This was because she had accepted a mission to infiltrate Konoha for secrets. While the interrogator entered her mind to extract information about her, she would simultaneously acquire Konoha's intelligence from the interrogator's mind.

The interrogator found that she hadn't obtained any Konoha intelligence, so he decided to start probing Hana Ling's mind for information about the Land of Locks. However, he discovered that she had an image of Kakashi's childhood in her mind. Therefore, the interrogator asked Kakashi to assist in the investigation.

The reason for Kakashi's childhood image was that Kakashi had rescued Hana Ling when she was a child and guided her, and from then on, Kakashi became the dream she always pursued in her heart.

Later, Hana Ling was cornered by Kakashi. Hana Ling had already deleted the information she had obtained because of Kakashi, and Kakashi also let Hana Ling go.

Chiba shrugged, "Of course, through Konoha's snakes. That girl is quite nice, and she seems to like you a lot. Weren't you very worried about her back then? Worried that she would be executed by Kagizaki Village for deleting the information?

Don't worry, I've taken care of that for you. I had Kamiyo represent Hidden Sound Village and form an alliance with Kagizaki Village, specifically naming Hana Ling as the representative. So, why don't you two develop something?"

Kakashi looked at Chiba with his dead fish eyes, feeling utterly speechless.