The most excited, of course, was Naruto. You should know that the Chunin Exams in Konoha Village would begin not long from now! This Chunin Exam would be conducted jointly with ninjas from other villages.
If he could master more fresh combat moves before the Chunin Exams, wouldn't he suddenly become famous and spread his name in other ninja villages?! Naruto immediately thought of this point.
...
With speed, and then matching it with strength, one's combat power could almost directly double! And in this ninja world, power is basically expressed in the form of ninjutsu, using chakra. In the world of pirates where Luffy lives, power can basically be seen as the comprehensive data representation of Haki,
Devil Fruit abilities, and one's own arm strength. If one wanted to quickly increase their combat power in a short period of time, Luffy had already given pointers on speed. Next was the aspect of strength.
"Actually, there's nothing much to say about this..."
Luffy belonged to that type of exceptionally talented and rare player. Even in intense, spontaneous combat situations, he could learn many useful combat knowledge and techniques. And his own combat ability was honed through countless real battlefields.
Compared to the era Naruto and Sasuke lived in, it was relatively peaceful. This was true whether compared to the chaotic Grand Line or the time of the Great Ninja Wars decades ago when people suffered greatly.
Luffy pondered hard, but alas, he had no experience in this area. For Luffy, cultivating was simply like eating and drinking; he became stronger effortlessly. Even in his pirate crew, his vice-captain Roronoa Zoro diligently trained every day without slack, and the effort and sweat he put in was something Luffy didn't even
know how much it amounted to! Yet the final result was that there wasn wasn't much difference in their actual strength. Sometimes, Luffy could even rely on his Devil Fruit ability to steadily gain the upper hand!
Although he didn't have experience in this area to provide for the young ninjas' training, Luffy had not eaten pork (meaning, he wasn't naive or inexperienced), he had seen such characters.
The people around him were all terrifyingly skilled cultivators. Whether they were his companions or relatives, there was not a single exception.
"I have a comrade, a swordsman. He swings a very heavy single-handed dumbbell every day. He uses this kind of training to improve his grip strength when holding a sword..."
"You two don't use swords, right...?" Luffy looked at Naruto and the others. Naruto and Sasuke both shook their heads. It made sense; after all, they were ninjas. Normally, ninjas primarily did things that were hidden, requiring stealth and assassination. Carrying a long sword for such missions was simply irrational. So, for ninjas, smaller, shorter kunai and shurikens were their favorites.
In fact, there were quite a few ninjas who were proficient in using kunai and shurikens. Some even specifically researched ninjutsu for such ninjas! "Speaking like this directly improves arm strength, it's more effective..." Luffy said, rubbing his chin after hearing Naruto and Sasuke's explanation.
"Oh right, how about you try my grandpa's training method?" Luffy suddenly had an inspiration. Naruto was naturally overjoyed. Mr. Luffy was already so strong. Then wouldn't his grandpa's strength be even more terrifying?! Sasuke, however, was a little more cautious.
"Is Mr. Luffy's grandpa also a master of combat?"
Luffy pouted. "Of course! Even I wouldn't dare to take my grandpa's punches head-on!" This sentence immediately put Naruto and Sasuke at ease. They had witnessed Luffy's strength firsthand. Looking at the current ninja world, few could steadily surpass Luffy.
But now, Luffy actually said he wouldn't dare to face his grandpa's iron fists. That also meant his grandpa's strength was even greater; he was a legendary master! To be able to learn the cultivation methods of a legendary master, wouldn't that be a huge gain?!
"You choose your targets." Luffy suddenly spoke. This startled both Naruto and Sasuke.
"Choose targets? What targets?"
Luffy began to explain. "When my grandpa used to train, he would treat mountains as sandbags, completely leveling eight mountains before he could leave the mountains and fight enemies!"
"Leveling... what?!" Naruto's eyes were so wide he couldn't close them.
Sasuke also stared intently at Luffy's face, seemingly trying to find evidence that he was lying.
"Leveling mountain peaks, eight great mountains, they were literally flattened!"
Naruto and Sasuke looked at each other. For the first time, they read the same thing in each other's eyes: helplessness.
Treating mountains as sandbags to pound, and even leveling them... is that something a normal person can do?
"Why do you two look so troubled?" Luffy looked at the two young ninjas before him, confused. Nonsense...
How can this be covered by "troubled"? A normal person couldn't do it at all! After a moment of thought, Luffy finally understood the reasoning behind it. "Oh right, my grandpa is a master of Armament Haki. With Armament Haki protection, he actually won't get hurt during training."
Naruto and Sasuke were even more speechless.
Your grandpa has Haki protection, but we haven't even learned how to sense the presence of Haki!
Completely unequal conditions, can we still copy his training method?
"Although you haven't grasped Haki yet..."
Luffy clearly realized this point too.
"But... chakra might be able to do the same thing." Although Luffy still couldn't truly understand what kind of energy chakra truly was in this world. But since it's one of the sources of power, it should also be able to do something similar to Haki, right? Even simulating it would have some effect, wouldn't it?
Listening to Luffy's explanation, Naruto and Sasuke actually felt a slight stirring in their hearts. They wanted to try and see if they could use the power of chakra to simulate the Haki entanglement Luffy mentioned.
"If you don't want to choose mountains as your targets and sandbags..." Luffy continued.
"My grandpa also used old, dilapidated warships destined for destruction as tools to hone his fist techniques."
The most numerous things in the Navy are, of course, people and warships. Although naval warships are mass-produced and standardized, even mass-produced items can still be intimidating and display power throughout the pirate world! Fighting against pirates is truly somewhat unbearable. Even a behemoth like Marine Headquarters shouldn't think it can get away without paying any price.
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