Afterward, Master Masaru returned to his quarters to meditate. Meanwhile, the legends instructed everyone to undergo a brief physical assessment to determine the elemental power most suited to them. When it was Yuto's turn, he discovered that fire was his suitable power.Following this, Master Yuzi Katzuki, a legendary master, was called upon. Yuto approached Yuzi and conveyed to the group the preliminary steps to mastering fire power. Yuzi explained that the training began with strengthening the muscles, followed by enhancing lung capacity, and then building overall stamina and physical strength. Next, trainees needed to regulate and elevate their body's core temperature to withstand fire's intensity. Yuzi emphasized that fire power was the second strongest elemental force. Curious, Yuto inquired about the strongest power, to which Yuzi revealed it was the power of the sun.Yuzi then initiated the first practical exercise by instructing everyone to break wooden planks. Yuto attempted but failed, crying out in pain from the impact. Yuzi advised him to focus on proper technique rather than sheer force. After several attempts, Yuto managed to break some planks but grew exhausted quickly. Persistent effort paid off when he finally shattered the planks completely.Next, Yuzi challenged the group to use katanas to break a large stone. Yuto once again exerted himself but the katana shattered under the strain. Yuzi corrected their grip and emphasized targeting the stone's weak points while channeling full power through precise strikes. Despite further attempts, Yuto broke a second sword. Then Yuzi assigned a physical endurance task: to lift heavy rock bags from one end of the training ground to the other. Everyone was fatigued. Yuzi ordered rest and instructed them to sleep to recover.For the following day, Yuzi commanded a regimen of repeated push-ups and lifting two rock bags over the same distance, pushing their limits further. After five months of rigorous training, Yuto significantly increased his stamina, strength, and muscle mass and succeeded in cutting the large stone.Yuzi then introduced a breathing endurance challenge. Trainees were instructed to submerge their faces in buckets of water for five minutes to improve breath control. Initially, no one could hold their breath for more than two minutes; Yuto was able to manage just three. Yuzi encouraged consistent practice. After two weeks, the entire group could hold their breath underwater for over seven minutes.The next test involved fire resistance. Yuzi instructed them to stand in the center of a blazing fire to acclimate to intense heat. None could endure the flames at first. Demonstrating his mastery, Yuzi stood inside the fire all day, meditating calmly. He encouraged the group to meditate and conquer their fear of fire. After six months, the trainees were finally able to stand and even walk through the fire without harm.Yuzi then taught them the art of wielding the katana: proper stance, how to swing, slice effectively, and avoid breaking the sword. After two months of intense swordsmanship training, everyone mastered the katana techniques.Finally, Yuzi revealed the devil's weak point and promised that on the next day, he would instruct them in harnessing their fire power for battle.
