The domineering Uchiha drove the Third Hokage mad!

Uchiha Mitsumine sat cross-legged in the underground chamber of the Hokage Building, with the Flying Thunder God Technique scroll left by the Second Hokage, Tobirama Senju, spread out in front of him.

The dense annotations on the scroll reveal the countless attempts and failures of those who came before.

"The first hurdle, advanced sealing techniques... No wonder so many people can't learn the Flying Thunder God Technique!"

Sealing techniques are variations and applications of Yin-Yang Escape, and the learning threshold is extremely high. Moreover, advanced sealing techniques are only the first hurdle for Flying Thunder God.

"The second hurdle is perception. You need to be able to communicate remotely with the Flying Thunder God mark using your mental power, thereby activating reverse summoning and summoning the user to the marked location."

If we rely on the Kaleidoscope Eye Technique: God's Eye, we should be able to meet this condition. However, it cannot be used under normal circumstances, which is a major drawback.

"The third hurdle is spatial talent, the Summoning Technique, which uses a blood contract and a summoning formula to achieve cross-space summoning. However, the Flying Thunder God's mark is only chakra... so a stronger spatial talent is needed to achieve one-way perception and attraction."

His fingers gently traced the text on the scroll, surprised that the learning threshold for Flying Thunder God Technique was so high.

Uchiha Sanfeng only knew low-level sealing techniques, and high-level sealing techniques were also his weakness, so he was stuck at the first hurdle.

The door to the secret room was gently pushed open, and Tsunade appeared in the doorway, her long golden hair flowing like gold in the candlelight.

Her voice carried a hint of reproach: "I heard you've locked yourself in here for two days, and haven't even gone to the security detail?"

Uchiha Mitsunori didn't look up, still staring at the scroll: "I roughly understand the principle of using the Flying Thunder God Technique, but this is not the traditional Body Flicker Technique at all. Its essence is a combination of advanced sealing techniques, advanced sensory abilities, and advanced spatial talents."

Tsunade raised an eyebrow and sat down beside him. "Have you run into some trouble?"

Uchiha Mitsunori finally raised his head and pointed to a complex jutsu pattern on the scroll: "I lack knowledge of advanced sealing techniques, so I can't understand the sealing technique diagrams here."

Tsunade leaned closer to examine it; strands of hair fell over Uchiha Mitsunori's shoulders, carrying a faint fragrance.

"This technique... is a variant of the Uzumaki clan's sealing technique, consisting of multiple layers of sealing techniques stacked together."

"The first layer, the lowest layer, this technique is used to store chakra!"

"The second layer seals a reverse spirit summoning technique. Note this node; it connects to the first layer!"

"The third layer contains a sealed loop specifically for use with the barrier; it should serve as a warning system, allowing the user to sense the surrounding environment within a 2-meter radius!"

"The fourth layer contains a self-destruct module. If forcibly broken, it will self-destruct!"

"The fifth layer contains a sealed communication formula, which should act as a switch!"

"The sixth layer contains the energy recharge module. Once the Flying Thunder God Seal's chakra is depleted, it needs to be recharged."

Uchiha Mitsunori suddenly grabbed Tsunade's wrist: "Tsunade, you know about this?"

Tsunade gently broke free: "My grandmother was Mito Uzumaki, the princess of the Uzumaki clan. I mastered this advanced sealing technique when I was 12 years old."

She pointed to the most complex part of the scroll: "Advanced sealing techniques require extremely strong chakra control to compress chakra to its limit, almost to the point of materialization."

Uchiha Mitsunori's eyes lit up: "Compressing chakra to its limit, huh?!"

Tsunade sighed helplessly: "Come to my room tonight, I'll teach you chakra compression techniques. Right now... your Sharingan is all bloodshot... you need to rest."

Uchiha Mitsunori wanted to retort, but couldn't help yawning.

That evening, Uchiha Mitsunori appeared in Tsunade's bedroom right on time.

Tsunade took out the First Hokage's green crystal necklace and said, "The higher the quality of chakra, the more realistic the things made will be, such as Ice Release and Crystal Release bloodline limits. This green crystal necklace was made by my grandfather, Hashirama Senju, using his chakra. Feel the chakra in the green crystal."

Uchiha Mitsunaga activated his Mangekyou Sharingan and used the Eye of God to observe the Green Crystal.

"Each chakra is of extremely high quality, and every twelve chakras are arranged in an orderly pattern, like countless military formations made of chakra. The arrangement of these formations is so tight and orderly that it's truly hard to imagine!"

Tsunade began to explain: "You have the Mangekyou Sharingan, so the quality of your chakra is also very high. The difference lies in the arrangement of the chakra."

Uchiha Mitsunori observed intently, and then a ball of chakra formed in his palm, but it was far less solid than Tsunade's.

Tsunade commented mercilessly, "Your chakra quality is higher than mine, but your control over it is too low, so your chakra is very loose. You need to make each chakra inch by inch like an obedient soldier before you can move on to the next step."

Uchiha Mitsunori closed his eyes, and when he opened them again, the kaleidoscope in his eyes began to spin.

The chakra in his palms immediately and obediently arranged itself.

Tsunade, unusually, praised, "You're... cheating with the power of your Mangekyou Sharingan... Never mind... just follow what I said before, stack the six layers of the Flying Thunder God Technique together..."

With the continued output of the Mangekyou Sharingan power from the Uchiha Mitsurugi, the first Flying Thunder God Seal kunai was successfully created.

Immediately afterwards, he formed hand seals and summoned a shadow clone, which then ran out of the room with the Flying Thunder God mark kunai to sense things.

As the shadow clone ran further and further away, the perception of the Flying Thunder God Mark became increasingly blurred.

"If I don't use the Mangekyou Sharingan, I can't sense the Flying Thunder God Mark beyond 100 meters... That's really a bit of a letdown!"

Uchiha Mitsunaga activated his Mangekyou Sharingan again and summoned a shadow clone to test the Flying Thunder God Seal. The shadow clone successfully teleported to the other side.

"You succeeded?"

As the shadow clone disappeared, Tsunade unconsciously took a half step forward, revealing her fair calves.

Uchiha Mitsunori closed his eyes and pondered, "It's a success, but I need the Mangekyou Sharingan to assist me. Otherwise, my Flying Thunder God Seal can only be used within 100 meters."

After saying that, he walked towards Tsunade and began to move his hands around restlessly!

Tsunade slapped his hand away, but couldn't hide the curiosity in her eyes: "It's good that you succeeded. You can continue practicing. By the way, with the Mangekyou Sharingan, what's the range at which you can use the Flying Thunder God Technique?"

Uchiha Mitsunori smiled confidently, his gaze piercing through the layers of trees: "My Mangekyou Sharingan, the Eye of God, can be understood as an enhanced version of the Byakugan. It allows me to see up to 72 kilometers away. Therefore, after using this eye technique, I can use the Flying Thunder God Technique within a 72-kilometer radius."

Tsunade pinched his nose: "This is even further than Minato Namikaze's Flying Thunder God Technique. By the way, how are you going to reward your older sister for helping you complete the Flying Thunder God Technique, you little pervert!"

Uchiha Mitsunori picked up Tsunade: "I learned the Flying Thunder God Technique so I could come and treat you more often! My dear Tsunade... sister!"

Upon hearing this, Tsunade gently hooked her arms around his neck and kissed him passionately...

"You little rascal, well then today... I'll reward you properly..."

"Ding, the host and his Daoist partner Tsunade have completed one dual cultivation session. Advanced Thousand Hands Sage Body Experience +100, Chakra Limit +5, Yang Attribute +0.01%"