Everyone's Chakra is unique, even more distinctive than their appearance. In the world of perception ninjas, sensing Chakra is much more reliable than recognizing a face.
In Mokgetsu's impression, only White Zetsu's Disguise Jutsu in the Naruto World can mimic Chakra. However, White Zetsu's Disguise Jutsu requires absorption first, while Mokgetsu just needs a glance, which is more advanced.
"I wonder if the Rinnegan can see through Transformation. If it can't, it would be easy to take Nagato as a disciple."
Mokgetsu immediately thought of a plan to take Nagato under his tutelage.
Using Habu Mokgetsu's identity to become Nagato's teacher is too difficult. First of all, Nagato himself would resist Mokgetsu being a Konoha Ninja.
Then, because of Obito, Uchiha Madara should know some information about Mokgetsu and might not be happy with Mokgetsu getting close to his Rinnegan.
If Mokgetsu isn't Habu Mokgetsu, it becomes much easier. He has many personas in mind that could earn Nagato's favor.
For instance, someone born in the Land of Rain, displaced by war and wandering the Ninja World, finally returning as a strong patriot trying to change his homeland.
Or a descendant of the ancient Ninja Sect, stepping back into the Ninja Continent to restore the peace lost by the constant warfare and strife among ninjas.
Mokgetsu quickly jotted down the plan in his mind. In the current Ninja World, the best candidate for Mokgetsu's fifth disciple spot is Nagato, not because of Nagato's potential, but because he can provide Mokgetsu with a massive Chakra benefit, compensating for Mokgetsu's weaknesses, or even turning them into strengths.
Next, Mokgetsu continued to test the Transformation Skill.
[Substitution Jutsu, Fire Release: Great Fireball Jutsu, Three Tomoe Sharingan, Fire Release: Impatiens Fire Jutsu...]
When scanning a Uchiha Jonin, Mokgetsu was surprised to discover that even the bloodline limit like the Three Tomoe Sharingan could be recorded by the Transformation.
Mokgetsu returned home without showing any signs and used the Transformation Skill again, this time consuming more Chakra than when transforming into a Chunin.
"If even the Sharingan can be transformed, doesn't that mean other bloodline limits aren't an issue?" Staring at the pair of blood-red eyes in the mirror, Mokgetsu was somewhat surprised.
The upper limit of the Transformation was higher than he imagined, capable of copying the Sharingan.
Mokgetsu, who was using the Sharingan, was sure that the Transformation Skill didn't just copy the appearance. At that moment, he truly had a pair of Three Tomoe Sharingan, his dynamic vision greatly enhanced.
Mokgetsu's regard for the Transformation Skill increased a notch. With the abilities shown by the Transformation, it might rank among the better ones in the S-level Drawing Scroll.
Currently, there's no Uchiha with Mangekyo Sharingan in Konoha, else Mokgetsu would definitely go and copy it. If the abilities of the Mangekyo Sharingan could also be copied, that would be truly powerful.
This Transformation also allowed Mokgetsu to test a limitation of the Transformation Skill, the consumption of information. The Sharingan he transformed into disappeared after twenty minutes and could no longer be used.
Mokgetsu tried canceling the Transformation state before reusing it to transform into the Uchiha Jonin, successfully reopening the Three Tomoe Sharingan.
Immediately after, Mokgetsu went to Tsunade's house, had lunch with her, and discussed the development of techniques compatible with the Yang Seal.
"Mokgetsu, have you made any new characters recently?" asked Tsunade, bored with the old characters.
Tsunade was now somewhat addicted, needing to play a few rounds of Ninja Slaughter every day.
"I haven't made any, but I'm thinking," Mokgetsu replied after some thought.
He didn't have the time to even think about creating Ninja Slaughter characters while developing Fuinjutsu at Loulan.
"Then hurry up and make some new characters, I'm so familiar with the old characters' skill explanations that I can recite them," Tsunade urged.
"Alright," Mokgetsu nodded and agreed, preparing to have his Shadow Clone design a few skill explanations like little essays for Tsunade to play with, thinking these would be more enduring.
Before leaving, Mokgetsu scanned Tsunade's information.
While scanning Tsunade, Mokgetsu could clearly feel Tsunade had much more information than an ordinary ninja, more than all the people Mokgetsu had scanned before combined.
Mokgetsu used Fuinjutsu to create a barrier around for vigilance before transforming into Tsunade.
He didn't want anyone stumbling in by mistake, getting the wrong idea and thinking he was a pervert.
By comparing the panel before and after the Transformation, Mokgetsu discovered transforming into Tsunade consumed as much as 15,000 points of Chakra.
Upon transforming into Tsunade, Mokgetsu found that he felt the Yin Seal, which he couldn't cultivate before, and many advanced medical ninjutsu appeared on his panel.
Since the Sharingan could be used when transforming into a Uchiha, Mokgetsu then tried restoring Chakra while resembling Tsunade.
"So fast," Mokgetsu felt like he had gone from 3G to 5G internet, with a greatly increased recovery speed.
Then Mokgetsu managed to meet Kushina, copying her information.
However, Mokgetsu was disappointed that copying Kushina couldn't transform him into a Chakra powerhouse, as the copied Uzumaki Constitution couldn't increase Chakra, nor could the Transformation copy the Nine-tails sealed within Kushina, only a bunch of Fuinjutsu.
By this point in the testing, Mokgetsu already understood the basic effects of the Transformation Skill.
Firstly, it couldn't increase the Chakra limit. No matter how much Chakra the transformation target had, Mokgetsu's Chakra limit wouldn't change, nor would the body's strength.
Though it couldn't increase the limit, if the transformation target had a special ability like the Senju Constitution, it could enhance Mokgetsu's Chakra recovery speed.