A Shaman from the Uzumaki Clan in the World of Naruto

Karina looked more relieved with Reiji's decision; for Karina, it was a good thing that Reiji remembered to learn how to make Explosive Tags.

Reiji sat on the floor, holding a book titled "Basics of Making Explosive Tags."

Reiji read diligently, allowing his eyes to trace each line in hopes of gaining a deeper understanding.

Meanwhile, next to him, Karina continued to skillfully make Explosive Tags, accompanied by Kushina, who watched in admiration.

However, the longer Reiji read, the more frustrated he felt.

Reiji's face scrunched up, his eyebrows knitted together, and his fingers tapped restlessly on the book.

"What is this? Why is this book full of nonsensical nonsense?" Reiji thought, frowning.

The instructions outlined in the book taught that one should "channel chakra into the ink, following the pattern of the existing Explosive Tag."

To Reiji, this sounded like very shallow instructions and did not provide a deep explanation of the letters, numbers, or seal formulas that were actually important in making Explosive Tags.

"What kind of nonsense is this? Who writes a book like this?" Reiji thought, growing increasingly annoyed, his hands almost throwing the book into the trash.

However, Reiji held back, trying to focus his thoughts and not get swept away in anger.

Determined to gain a better understanding, Reiji continued reading.

Unfortunately, the more Reiji tried, the deeper his hatred grew for the book's author.

The explanations seemed too complicated and convoluted to Reiji, making Fuinjutsu appear as an art that could only be understood by geniuses or those who were "crazy" enough to navigate this puzzling path.

"No wonder Fuinjutsu is considered difficult! If I become the Head of the Uzumaki Clan in the future, the first thing I will do is burn stupid books like this."

"Then I will replace those books with something truly useful," Reiji thought, glaring at the book in anger.

Finally, with a heavy sigh and a slight headache, Reiji closed his book.

He realized that he would not find anything meaningful from this reading.

With a sense of disappointment but an unwavering determination, Reiji decided to set aside the confusing theory and start practicing making Explosive Tags directly, hoping that practical experience would provide him with more insight.

In the training room, which was a basement, Reiji dipped his brush into the carefully prepared chakra ink.

Once the brush had absorbed enough ink, Reiji began to draw the pattern with steady movements, channeling chakra from within his body to the tip of the brush.

The ink then seeped into the special paper, forming delicate letters that seemed to glow on the surface of the paper.

Following the formula he had learned, Reiji wrote down several basic letters to form the seal structure known as "Explosive Tag."

Reiji knew that to activate this seal, three main elements had to be present: [Letters and Numbers], [Formula], and [Keyword].

The letters and numbers formed the foundation of the seal structure, the formula was the arrangement pattern of the symbols, and the keyword determined the final effect of the seal.

Reiji then added the keyword [Fire] to his formula.

Reiji understood that this keyword was the core of the explosive power of the Explosive Tag; when activated, this seal would produce a large fire explosion.

But Reiji's ideas didn't stop there.

He was curious, "What if the keyword is changed?"

Imagining various scenarios, Reiji then realized a possibility that by changing the keyword [Fire] to [Water], the resulting explosion would be different—producing a high-pressure explosion that released water instead of fire.

"Fuinjutsu is indeed complicated," Reiji murmured, "but there is beauty, versatility, and effectiveness in its complexity."

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