"Every time the Breathing Technique reaches a new level, it undergoes a qualitative change. Mastering the next realm after Full Concentration Breathing is to achieve a state of continuous Full Concentration Breathing, keeping your body in this state every second of every minute."
Mokgetsu began leading Shisui and Obito in the cultivation of Constant State with the Breathing Technique.
In the world of Demon Slayer, mastering Constant State is foundational to becoming a Pillar, a crucial cultivation practice that greatly enhances physical abilities.
Similarly, the Constant State of the Hokage's Breathing Technique is equally important. Mastering it allows for the accelerated ability of Nature Transformation to be continuous, meaning your Nature Transformation will inherently be stronger and greatly enhance physical abilities.
Mokgetsu's growing strength is significantly related to the Constant State of Breath of Rock.
"Huh? Keeping Full Concentration Breathing all day long, how is that even possible? It would exhaust me to death," Obito thought about his state when using Full Concentration Breathing, finding it hard to imagine.
Shisui looked at Mokgetsu, his expression also somewhat confused. As a burst technique, how does one cultivate Full Concentration Breathing to maintain it 24/7?
"It's not as difficult as you think, practice more and you can do it," Mokgetsu said with a smile, believing that Obito's compatibility with Breath of Flame would make Constant State achievable.
"But right now I can only maintain Full Concentration Breathing for four minutes," Obito felt that Mokgetsu's advice probably meant practicing for several years.
"Constant State doesn't require you to be in the extreme breathing state every moment, but rather relatively concentrated. Suppose the peak breathing can enhance your power by a hundred; in Constant State, you only need to achieve seventy or eighty," Mokgetsu explained.
"I see, but even with that, won't the Chakra be insufficient?" Obito began to understand a bit, then continued asking, since the native Breathing Technique of the Hokage requires Chakra to achieve the maximum effect.
"When not in battle, you can choose not to incorporate Chakra or maintain a minimal Chakra output. There's specialized training for this," Mokgetsu answered.
It's best to incorporate Chakra, as it enhances the effect further, and during battles, there's no need to adjust again. After all, the disciples now have limited Chakra, so they'll start with a basic version.
With Mokgetsu's explanation, Shisui understood the significance of Constant State; essentially, it's about raising the upper limit of their Breathing Technique.
If they can maintain breathing at eighty percent output all day, their actual breathing limit certainly won't remain at a hundred; it might multiply several times.
"First, enter a state of Full Concentration Breathing without using Chakra." After the explanation, Mokgetsu began formal Constant State cultivation training with the students.
Obito and Shisui complied with Mokgetsu's instructions to enter Full Concentration Breathing.
Slam!
Obito got a tap on the head, and Mokgetsu withdrew his hand, saying, "Don't use Chakra."
Through the Byakugan, Mokgetsu clearly saw that Obito was using Chakra for the Breathing Technique.
"Oops, it's a habit, I used it unconsciously," Obito said sheepishly, scratching his head, having already made a mistake in the first step.
Normally, Full Concentration Breathing is used to defeat the enemy in one breath, so naturally, it would be as strong as possible.
Boom!
Just then, a sudden loud noise occurred. Obito and Shisui looked and saw Mokgetsu's Shadow Clone bringing several stones of varying sizes, with the smallest being about Obito's height and the largest over three meters tall.
"Come on, let's start cultivating, holding these stones and doing deep squats until you can no longer maintain Full Concentration Breathing," Mokgetsu laughed and pointed at the boulders beside them.
"So we start at such a difficulty level?" Obito was a bit dumbfounded; he remembered when he first started practicing the Breathing Technique, it was just inhaling and exhaling in place, but now Constant State training starts at visible intensity levels.
Shisui walked forward calmly and tested each one, finally choosing one about Obito's height to lift and began doing deep squats.
The stones looked heavy, but in the state of Full Concentration Breathing, even without incorporating Chakra, there was a considerable enhancement to physical ability.
Seeing Shisui start training directly, Obito quickly went forward to pick a slightly larger stone than Shisui's and began training.
It wasn't that he was competitive and must choose a bigger one than Shisui's, it was just that Shisui had taken the smallest one.
Though when he lifted the stone for a deep squat, it wasn't as heavy as Obito imagined.
Of course, this was just the beginning. As time passed, after five minutes, Obito felt somewhat strained, starting to struggle to maintain Full Concentration Breathing.
Maintaining Full Concentration Breathing is inherently exhausting, not only physically but also mentally demanding.
Eventually, Obito put down the stone at five and a half minutes, and Shisui put it down at five minutes, half a minute less than Obito.
"You maintained Full Concentration Breathing for five and a half minutes; see, you can actually endure more than you imagined," Mokgetsu praised with a smile.
Obito's fatigue vanished instantly, replaced with a goofy grin, as Mokgetsu always managed to provide timely positive feedback.
"Shisui, you're doing well too; as you're a bit younger, it's natural to face some disadvantages," Mokgetsu comforted with a pat on Shisui's hair.
Shisui smiled faintly.
Mokgetsu didn't give the two any rest time, and three minutes later, Mokgetsu instructed them to re-enter the Breathing Technique state and utilize all the power the Breathing Technique could offer.
"Next is running; continue until you can no longer maintain the Breathing Technique," Mokgetsu stated.
The training for Constant State is essentially to make the body remember the Breathing Technique, so it can maintain Full Concentration Breathing all day, even subconsciously during sleep.
Therefore, the intensity of Constant State training is particularly high, completely different from the entry-stage practice.
If not for Mokgetsu having a Training Elixir, he might also slow down the training, since this intensity is more intense than Might Guy's training.
By the end of the training, Obito was so fatigued he was losing sense of direction, feeling like his body no longer belonged to him, as if his soul might float skyward at any moment.
"So tired," Obito genuinely sighed.
He felt that compared to today's training, all previous training was pathetic; he lost count of how many times he used Full Concentration Breathing, and later he couldn't discern between regular breathing and Full Concentration Breathing.
Running, weighted deep squats, weighted push-ups, and various basic exercises with the condition of maintaining Full Concentration Breathing became incredibly exhausting.
Even Shisui couldn't maintain his usual composure, looking thoroughly exhausted.
Mokgetsu simply smiled without speaking, thinking that this was nothing; these were just beginner-level exercises, with more enhancement training to come.