Before, Zhang Miao wanted to recruit Tsunade primarily to obtain her Sage's Body*. However, what he didn't expect was that he would obtain the Sage's Body because he recruited Tsunade.
So, amidst his surprise, he still had some doubts.
"What does this primary Sage's Body mean? Are there intermediate and advanced Sage's Bodies?"
"Yes, Your Holiness!"
Just as Zhang Miao's doubts arose, the system immediately provided an explanation.
"The Sage's Body's level is distinguished based on the amount of chakra. Your Holiness's total chakra amount is only equivalent to half of an intermediate Sage's Body, so please recruit more ninjas to obtain more chakra and evolve the primary Sage's Body to an advanced level as soon as possible!"
"Eh... Not enough chakra?"
After listening to the system's explanation, Zhang Miao was puzzled once again, and his eyebrows furrowed instantly.
"That's impossible, right? Excluding the recruited ninjas, the chakra from just the four tailed beasts I recruited should be sufficient, right?"
"Your Holiness is mistaken!"
As Zhang Miao's doubt emerged, the system's voice echoed in his mind once again.
"Tailed beasts belong to a different system. Your Holiness can harness and use them, but they cannot be equated with the Sage's Body."
"I see!"
After hearing this explanation from the system, Zhang Miao immediately nodded.
"I understand. So, how many more ninjas do I need to recruit to evolve the Eternal Mangekyou Sharingan into the Rinnegan?"
Zhang Miao's main goal was to obtain the Sage's Body to evolve the Rinnegan, and he had no reason to hide this question now.
The system understood his intentions, so upon hearing this question, it immediately provided an answer.
"Your Holiness, the Rinnegan, also known as the Sage's Eye, requires an advanced Sage's Body for its evolution. Of course, with your current situation, you can choose to evolve it, but the resulting Sage's Eye may not be complete. Would Your Holiness like to proceed?"
Zhang Miao never liked incomplete things, so upon hearing this explanation from the system, he immediately waved his hand without hesitation.
"No, I want to evolve it directly into the best. Alright, open Tsunade's ninja specialties for me!"
"Yes, I will now open Tsunade's ninja specialty list for Your Holiness!"
Upon hearing Zhang Miao's words, the system's voice immediately sounded, and at the same time, Tsunade's ninja specialty list appeared in front of Zhang Miao.
First Option:
Senju Bloodline: Descendant of Asura, from the Senju clan's bloodline, possesses powerful self-healing abilities and vast chakra, a Kekkei Genkai, one of the top bloodlines in the ninja world.
Note: Your Holiness has already obtained this and cannot choose it again.
Second Option:
Byakugou no Jutsu: An S-rank ninja technique created by Tsunade, it can release the Byakugou Seal to gain a large amount of chakra, significantly increasing strength and reaction speed, allowing for the use of certain chakra-consuming ninja and forbidden techniques!
Note: A ninja technique for releasing water, of no use to Your Holiness.
Third Option:
Creation Rebirth: An S-rank ninja technique created by Tsunade, when used in conjunction with Hundred Healings Jutsu, can instantly heal any damage to the body, even fatal wounds, at the cost of one's life force.
Note: Please forgive this system for speaking frankly, but this specialty is of no use to Your Holiness!
Fourth Option:
Slug Princess: Known as the "Slug Princess," Tsunade possesses top-tier medical ninjutsu and the powerful spirit beast Katsuyu, capable of dividing and treating the entire village's people, unmatched in group healing methods.
Note: Your Holiness, it seems this is the only valuable specialty for you!
Zhang Miao: "..."
Darn it, why did they present four options when I can only choose one?
Thinking this, Zhang Miao couldn't help but roll his eyes.
"System, in the future, when there are specialties that can't be selected and ones you don't recommend, just skip them!"
"Yes, Your Holiness!"
As soon as Zhang Miao spoke, the system immediately responded, and he found that only one option remained, which was the fourth option.
Seeing this, he nodded with a smile.
"Yeah, that's it!"
After saying that, Zhang Miao selected this option, and the system's notification sounded in his mind.
"Ding! Congratulations to Your Holiness for obtaining the specialty 'Slug Princess.' Because Your Holiness is male, it has been modified to 'Slug Prince.' When choosing this option, Your Holiness has automatically entered into a contract with one of the Three Holy Places of Summoning Beasts, the Shikotsu Forest. Your Holiness can now communicate with slugs!"
"Uh... Is this like a buy one, get one free deal?"
After listening to the system's notification, Zhang Miao shrugged once again, feeling helpless. "Fortunately, the contract is with the Shikotsu Forest, or signing with the Mt. Myoboku or Ryuchi Cave would have been troublesome."
For Zhang Miao, among the Three Holy Places of Summoning Beasts, the Shikotsu Forest was the only one he was willing to accept, for a simple reason: convenience!
This was because both the Mt. Myoboku and the Ryuchi were communities, with the Mt. Myoboku being the community of toads and the Ryuchi being the community of snakes. Entering into a contract with such places meant having to deal with their entire communities.
And what Zhang Miao disliked the most was dealing with those inexplicable folks!
But the Shikotsu Forest was different. Although it was one of the Three Holy Places of Summoning Beasts, it had only one slug, the same one Tsunade had a contract with—Katsuyu!
Katsuyu was the only slug in the Shikotsu Forest, but it could split into countless slugs. It's worth noting that slugs weren't just proficient in healing; their acid-spitting attacks were also quite formidable. Even someone as resilient as Orochimaru had to be cautious.
Unfortunately, Tsunade hadn't fully summoned Katsuyu. In the original storyline, when Pain invaded, both Sakura and Tsunade activated the Creation Rebirth and jointly used the summoning jutsu, but they only summoned one-tenth of Katsuyu's split body.
It's important to know that in the ninja world, size often represents strength, and slugs weren't just skilled in healing; their acid-spitting attacks were also fearsome. If Tsunade had fully summoned Katsuyu, there would have been no need for Kakashi and Yamato to intervene during the fight against Pain.
But what Tsunade couldn't do didn't mean Zhang Miao couldn't do it. Thinking about the power of slugs, he couldn't help but grin.
"Haha, with slugs, I can catch anyone who annoys me and have them melted into goo with a mouthful of acid. What's more, Katsuyu has a good temperament, much better than those toads and snakes!"
Just as Zhang Miao was considering whether to summon the slug to say hello, the door was opened with a "swish," and Tsunade, carrying a gourd of sake, walked in.
Upon entering, Tsunade immediately noticed the familiar figure in the room, and her eyes widened.
"Uh... What is this?"
Clearly, Tsunade had already recognized herself from the Third Great Ninja War era, so at this moment, she was completely stunned and couldn't speak for a while.
Seeing her inexplicably shocked expression, Zhang Miao scratched his head and then sighed in helplessness.
"Tsk... Um, she is your long-lost sister, Tsunato. How do you like this explanation?"
Tsunade: "..."
What kind of lousy name is that?
*TL Note: I think it's a better translation.