"Indeed, the power is not small..."

Seeing the destructive power caused by his Senjutsu attack, Yu couldn't help but nod in satisfaction.

Not only that, after entering Sage Mode, he could clearly feel that all his attributes, including sensory abilities, were greatly enhanced, and with the assistance of Observation Haki, he could see through everything around him.

Moreover, Yu also believed that when he was in the state of Sage Mode, although the amplification of his Taijutsu might not yet match the tenfold combat power brought by Shunko, his speed, strength, and even recovery ability would far exceed his normal state.

Thinking of this, Yu was about to take advantage of the amplification effect of his Taijutsu in Sage Mode, but suddenly felt a wave of fluctuation in his body. The Senjutsu Chakra that had just merged together suddenly repelled each other, and then dispersed again, returning to ordinary Chakra and natural energy.

As the Senjutsu Chakra in his body dissipated, the dark purple facial markings and eye shadow on Yu's face gradually faded away until they disappeared completely.

"It seems that your Sage Mode is not very proficient yet, as the effect can only be maintained for one minute," Tagitsuhime remarked, noticing the disappearance of the Sage Mode characteristics on Yu.

"Well, I didn't expect to exit the Sage Mode state so quickly. It looks like I still need a long time to practice," Yu said thoughtfully after exiting the Sage Mode state.

In the anime, the main character Naruto Uzumaki could only maintain Sage Mode for a few minutes when he first started training, and it took a long time to absorb natural energy. Later on, he refined Senjutsu Chakra by absorbing natural energy through Shadow Clones to supply to his main body during battles, until the final stages of the Great Ninja War when he could rely on the Nine-Tails to continuously absorb natural energy to maintain Sage Mode.

On the other hand, the First Hokage, Senju Hashirama, could swiftly enter Sage Mode with just a seal, and from what can be seen in the anime during his battles with Uchiha Madara, his Sage Mode seemed to last for a long time, evidently placing him at a higher level than Naruto Uzumaki and Jiraiya.

"So, my Sage Mode is still just at the Beginner stage. Being able to successfully cultivate Sage Mode so quickly indicates that my starting point is already higher than theirs, and there are still many things to explore next.

Moreover, as the foremost 'golden finger' in the world of Naruto, the effectiveness of Sage Mode is beyond doubt. Even beings like the later-stage Ten-Tails Jinchuriki Obito, Six Paths Uchiha Madara, and Otsutsuki Kaguya, who possess Six Paths-level control over the Five Elements and Yin and Yang, cannot absorb or nullify Senjutsu. This is also one of the key reasons why Yu values Sage Mode the most.

"Anyway..."

"I must thank you, Tagitsuhime-sensei, for bringing me to the Dragon Transformation Pool to train in Senjutsu. I feel very sorry for the damage caused here."

After sorting out his thoughts upon exiting Sage Mode, Yu thanked Tagitsuhime beside him. Regardless, it's an undeniable fact that Ryuchi Cave taught him Sage Mode.

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"Never mind, those stalactite forests will grow back sooner or later..."

"However, the fact that you were able to cultivate Sage Mode so quickly also proves that the White Snake Sage's judgment was not wrong."

Hearing Yu's thanks, Tagitsuhime, although still feeling a bit awkward, graciously waved her tail and spoke up.

"It's been quite a while in the ninja world..."

"I think it's time for me to go back. Tagitsuhime-sensei, please convey my thanks to the White Snake Sage."

After saying this, Yu realized that it had been almost four days since he arrived at Ryuchi Cave, and he didn't know how much time had passed in the outside ninja world. Haku and Kimimaro, those two little troublemakers, were still left in the hotel in the Land of Rice Fields by him.

"Alright, if you have things to attend to, then you should go first..."

"I'll go back and report to the White Snake Sage about your successful completion of Sage Mode."

Seeing that Yu had successfully completed Sage Mode, Tagitsuhime nodded.

"However, I plan to leave a few Shadow Clones here to continue training in Senjutsu. Shouldn't be a problem, right?"

Saying this, Yu recalled the way Naruto Uzumaki trained in Senjutsu in the anime. He then formed hand seals, and a series of smoke emerged beside him, revealing several Shadow Clones that looked exactly like himself.

"Using so many Shadow Clones to train here..."

"Don't blame me for not warning you. When it comes time to recall the Shadow Clones, will your body be able to handle such a massive amount of Senjutsu Chakra?"

Seeing that Yu intended to leave these Shadow Clones in Ryuchi Cave to continue training Sage Mode, Tagitsuhime seemed to kindly remind him.

"Don't worry, it's not my first time training like this."

Hearing Tagitsuhime's reminder, Yu smiled faintly, manipulating Kaio to open a portal to his dimension, and with all the Devil Puppets, they stepped into it, disappearing completely.

"So convenient, this Space-Time Ninjutsu..."

"To be able to move freely between the ninja world and Ryuchi Cave..."

Seeing Yu disappear into the alternate space of the Door Door Fruit, and observing the Shadow Clones of Yu still training Sage Mode by the Dragon Transformation Pool, Tagitsuhime couldn't help but mutter to herself.

Generally, for a ninja to enter one of the Three Great Sacred Places or a Summoning beast's space, they must first sign a Summoning Contract with them. Only then can they be summoned to the Three Great Sacred Places or a Summoning beast's space through Summoning Jutsu. However, Yu, who possesses the ability of Kaio's Door Door Fruit, can now freely enter and exit Ryuchi Cave as he pleases.

"Mount Myoboku has nurtured so many ninjas capable of using Senjutsu, and the Shikkotsu Forest has even helped ninjas like Senju Hashirama, who ended the chaos era, to cultivate Sage Mode..."

"It seems that this time, our Ryuchi Cave... will also produce an unimaginable figure..."

...

Land of Rice Fields, the same old town.

In a hotel at the end of the street, the door to another dimension opened, and Yu's figure silently appeared.

"Yu-sama!!"

"Yu-sama!!"

Seeing Yu, who had been missing for four days since going to the Hidden Sound Village with Fuma Sasami, suddenly appear, Haku and Kimimaro couldn't help but exclaim with joy.

"Sorry to keep you waiting..."

"Pack up, let's leave here."

Seeing the joyful faces of the two little troublemakers, Yu's lips curled up slightly.

But at that moment, his Observation Haki suddenly sensed three extremely powerful Chakras approaching rapidly from a few hundred meters away on the street, and their speed was astonishing. Among them, Yu had once seen the owner of one of the Chakras.

Boom!

The speed of the newcomers was incredible. In just a few breaths, the door of the hotel room was chopped into several pieces, collapsing with a thunderous noise, raising a cloud of dust.

As the outlines of the three unwelcome guests became clearer in the mist, along with the ominous aura emanating from their black and red cloud-patterned cloaks, a subtle curve formed at the corner of Yu's mouth.

"It seems there's no need to pack up..."

"Haku, Kimimaro, we have guests"

----

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