Shinjō placed his right hand on Tsunade's shoulder and Hand Seals to Flying Thunder God.
The two appeared at the epicenter of the explosion. The surrounding area was devastated; a crater about 30 meters in diameter had been blasted into the lakeside by the massive explosion. Trees within a radius of 100 meters had been pulverized by the massive amount of water vapor.
Theoretically speaking, compressing a 3-meter diameter natural water mass into the size of a fist would create an explosive force equivalent to over 70 tons of TNT, with an blast radius of 300 to 500 meters.
However, actual tests at Shinjō showed that the blast radius of the Water Mine was not as large as expected, likely due to limitations imposed by the volume of the water mass.
Although theoretically its explosive power is equivalent to 70 tons of TNT, the water before compression is only about 14 cubic meters.
The more dispersed the explosion, the greater the attenuation of its force.
(The above data was calculated by Doubao)
Shinjō walked to the edge of the blast radius and reached out to pick up the broken leaves on the ground. He was already hundreds of meters away from the epicenter of the blast, but the leaves in his hand had been turned into a paste by the water vapor.
Overall, the new Ninjutsu's power is passable. Shinjō's initial intention in developing it wasn't for its true power, but because both Obito Uchiha and Nagato possessed the Rinnegan, allowing them to absorb ordinary Ninjutsu.
The Water Mine that Shinjō is currently developing are powered by water, which exists in nature and falls under the category of physics; they do not rely on Chakra.
The ideal speed of Water Mine explosion is 5 kilometers per second, but just like its theoretical explosive power, it is affected by air pressure and does not reach the theoretical value.
In reality, the explosion's speed was only about 2,000 meters per second.
Even so, it's enough to give Nagato or Obito Uchiha a run for their money.
Furthermore, this Ninjutsu has another advantage: it does not consume Chakra. Each water ball compressed by the Sealing Jutsu can be stored, and when needed, the seal can be pried open using the electron-infused water mist.
Tsunade Teuchi at Shinjō. This apprentice was always full of ingenious ideas, yet she could still successfully develop them. The Reverse Four Symbols Seal had existed for countless years, but no one had ever thought of using it to compress the water sphere.
If Shinjō had been born a few decades earlier, he could have been invincible on the battlefield with just this one move, and so many tragedies wouldn't have happened.
Shinjō stood on the water again and used a sealing Ninjutsu to compress a water mass about 3 meters in diameter into a sealed water sphere.
Tsunade took it and tossed it in her hand. This seemingly unremarkable sealing water sphere, if it were to explode in her hand, would reduce both of them to ashes.
As the developer of this Ninjutsu, Tsunade could theoretically use it as well, but unlike Shinjō, she couldn't unseal it from a distance using Chakra sensing. If she were to use it herself, she could only use Shadow Clone to explode it at close range.
Shinjō asked Tsunade, "Can we increase the sealing range?"
Tsunade and thought for a moment, then shook her head and said, "Increasing the sealing range further wouldn't make much sense. The current Sealing Jutsu's structure is already perfect enough; increasing the range of the Ninjutsu would make it difficult to stabilize."
Shinjō secretly sighed in regret. The teacher was right; the current compression range was already the most ideal state achieved through calculation.
While the larger the volume of the sealed water sphere before compression, the greater the power of its explosion, the greater the computational complexity of the Sealing Jutsu and the increased stability after compression, which also increases the risk.
If something given to the enemy were to explode in your own hands, it would truly become a joke.
The Shinjō continued to compress the water sphere and detonate it at the same location to calculate the actual damage range and power of the Water Mine.
Imagine what would happen if Water Mine exploded on Susanoo.
Having personally experienced the hardness of Sasuke Susanoo, Shinjō quickly came to the conclusion: if it were in its skeletal form, then Water Mine should be able to blast it apart, but once Susanoo complete form, its defense was simply beyond the reach of Water Mine.
Don't be fooled by the fact that Water Mine can create a crater with a radius of 30 meters; in the Shinobi World, there are plenty of Ninjutsu that can achieve the same level of power.
Even Tsunade, the teacher, can inflict the same damage with her fists.
As Shinjō Hand Seals, black runes spread from his hands and disappeared beneath the water's surface. Shinjō quickly Flying Thunder God to dodge.
The black Sealing Jutsu Issen by, carving a circular hole about 3 meters in diameter into the lake. Shinjō Flying Thunder God again, catching the falling Water Mine in his hand.
Using this sealing Ninjutsu requires a large amount of Chakra, almost one calorie each. But its advantage is that it can be stored.
Among the five types of Ninjutsu, Shinjō's most proficient technique was not the Storm Release he developed later, but the Water Release he chose from the beginning.
The reason it was used less often later on was because Water Release Ninjutsu was too limited by the environment.
Although Shinjō's Chakra reserves are enough to create a large amount of Chakra -mimicking water in a waterless environment, water created from Chakra is not naturally occurring water. When it encounters someone like Nagato who can absorb Ninjutsu, the Water Release will not be able to exert its power.
Furthermore, the limited space that storage scrolls can hold makes the idea of storing water in the Shinjō difficult to implement.
Now that we have Water Mine, we can store Water Mine one by one in a storage scroll. In the heat of battle, we can use a few dozen Water Mine to calm our nerves.
Even if the enemy is powerful and the Water Mine fail to kill them, the water left on the ground can still create a favorable environment for the Shinjō.
Tsunade walked over and patted Shinjō on the shoulder. "Have you named this Ninjutsu yet? We can't keep calling it Water Mine, can we?"
Shinjō thought about it and realized that since he was called an immortal, it was normal for him to possess the abilities of an immortal.
Let's call it Palm Thunder.
Tsunade raised an eyebrow, offering no objection to the new Ninjutsu's name.
Tsunade snatched the Palm Thunder from Shinjō's hand and said to him, "Make more, and give me a few hundred."
"Hundreds of them? Teacher, you might as well just kill me! You developed this Ninjutsu yourself, you know it consumes a lot of Chakra! Hundreds of them! It'll take me half a month to make them!"
Shinjō currently has about 70 Chakra units. Even if he disregarded his life and drained all his Chakra, he could only do about 70.
Tsunade crossed her arms and said in an unyielding tone, "It's not that I don't care about you, Teacher. I'll give you a 50% discount and make 100."
Shinjō said with a pained expression, "Teacher, 100 is too many. I still need to develop other Ninjutsu. Can you give me half the number?"
Tsunade and thought for a moment, then said, "Alright, I'll give you a 50% discount. Make 50 and hand them in! This is the task the Hokage gave you!"
Okay, Shinjō surrenders. We can make 50 if we grit our teeth.
Watching Tsunade turn and leave with a smug look on her back, Shinjō suddenly realized that his teacher had never expected him to do much in the first place; 50 was far from her bottom line.
She's been tricked! The young Tsunade has been corrupted by a teacher from another world!