In addition to Sasori's past, Ryou also obtained all of Sasori's Ninjutsu.
The Secret Technique: Memory-Concealing Sand Manipulating Technique is a Ninjutsu that involves piercing the memory center of the brain with extremely small needles to seal away the target's memories.
Yura, a high-ranking Jonin of Sunagakure, was Sasori's spy. He had been placed under the Memory-Concealing Sand Manipulating Technique by Sasori to seal his memories of serving him, leaving Yura entirely unaware that he was a spy.
It wasn't until Sasori released the technique in the original work that he finally regained his senses.
It was also because of Yura's guidance that Sasori and Deidara were able to smoothly pass through Sunagakure's narrow pass and enter the Sunagakure.
Furthermore, there was Sasori's core human puppet manufacturing technology. The most vital part of this technique lies in the Chakra core.
Sasori fashioned the deceased's heart along with their Chakra pathway system into a Chakra core, ensuring that the human puppet inherited the Ninjutsu and Kekkei Genkai they possessed in life.
The core of the Chakra core is the Ninja's heart and Chakra pathway system.
The heart is the core of Chakra in a Ninja's body; it acts as the power pump in the Chakra system, and all Chakra flow must pass through the heart's Chakra pathway system.
The heart is also the carrier of Chakra attributes; what attribute a person's Chakra possesses is entirely determined by their heart.
In the original work, Kakuzu's Secret Technique, Earth Grudge Fear, involved seizing others' hearts to inherit their Chakra along with its attributes.
Then there was Sasori's poison techniques, the regeneration core technology, the 'Third Kazekage User Manual', 'Sasori Maintenance Precautions'... Sasori's life and Ninjutsu were all devoured by Ryou.
Ryou withdrew his Chakra. Suddenly coming into contact with so many memories and Ninjutsu left Ryou's spirit somewhat exhausted.
It felt like watching several thousand episodes of a mother-in-law versus daughter-in-law drama.
This was even with him being from the spirit-attribute Uchiha Clan and possessing the Sharingan.
An ordinary person would likely have lost themselves in Sasori's past, unable to distinguish their own identity.
Candy considerately used her paws to massage Ryou's temples, using a tiny amount of Lightning Release to give Ryou a gentle little shock.
Ryou instantly felt refreshed.
"..."
After Sasori regained his autonomy, he remained silent. He knew exactly what had happened to him.
His entire past had been seen through by Ryou, and every Ninjutsu he possessed had been squeezed dry by him.
What could Sasori do?
Now, he only wished for death to end it all.
But for him now, even death was a luxury.
Ryou teased Sasori: "Sasori, this is where you're wrong."
"Your parents died in the Second War; they fell on the battlefield. How can you blame White Fang and the Third Kazekage?"
"On the battlefield, Kunai and shuriken have no eyes, Black brothers' languages are unintelligible, and Tailed Beasts don't have rearview mirrors."
"Sasori, do you still not understand the survival laws of a Ninja?"
"..."
Sasori didn't answer; he had been driven into a state of self-isolation by Ryou.
Ryou shook his head: "So you've shut down. Sasori, your psychological resilience isn't good enough; you still need to practice!"
Sasori could turn someone into a puppet right after killing them; his psychological resilience was like Orochimaru's—the kind of ruthless person who didn't value human life at all.
But facing someone as shameless as Ryou, Sasori was out of options.
Ryou ignored Sasori and had Candy summon the Third Kazekage that had been automatically picked up earlier. Then, he extended Chakra Threads from his fingers and began to control the Third Kazekage.
Chakra Threads are a highly concentrated, thread-like physical form of Chakra, and they are the core combat method for a Puppeteer.
This belongs to the advanced application techniques of Chakra.
Chakra Threads require extremely high precision, condensing Chakra to a single point at the fingertip while controlling it so it doesn't dissipate, explode, or drift.
At the same time, for Chakra to become thread-like, it requires shape transformation, controlling the flowing Chakra into fine lines.
Just these ordinary Chakra Threads have deterred a vast number of Ninjas.
The requirements for a Puppeteer's Chakra Threads are even higher. A Puppeteer doesn't just manage one Chakra Thread; each finger must control one.
Theoretically, a Puppeteer can control a maximum of ten Chakra Threads.
The more Chakra Threads a puppet has, the easier it is to manipulate.
An expert needs only one Chakra Thread to perfectly control a puppet, such as Chiyo's White Secret Technique: Ten Puppets of Chikamatsu.
One who cheated like Sasori didn't care about common sense at all, simultaneously manipulating over a hundred puppets, subverting the imagination of Puppeteers.
In short, mastering Chakra Threads requires exceptionally superb Chakra control skills.
Every Puppeteer is good potential for becoming a Medical Ninja.
A Puppeteer like Kankuro is just an average person.
Sasori and Chiyo represent the elite of Puppeteers; they are not only Puppeteers but also poison masters who are well-versed in every organ of the human body.
Ryou's Chakra control skills were at the Forbidden Jutsu level. A technique like Chakra Threads was not difficult for Ryou, who had just forcibly absorbed Sasori's memories; he learned it on the spot.
Ten Chakra Threads shot out from his fingers, entering the Third Kazekage's body and instantly connecting to the Third Kazekage's Chakra core and joint system.
"Creak, creak, creak—"
Under Ryou's control, the Third Kazekage made the distinctive sounds of a puppet, then slowly stood up and began to move under Ryou's command.
Coming into contact with a puppet for the first time, Ryou first had the puppet perform a set of movements to get familiar with it.
For example, performing a dance.
Dribbling a basketball, spinning around and swaying hips, thrusting hips, twisting the waist, clutching the crotch with one hand... Candy, Snowy, and Nekomata found it painful to watch.
Sasori was also watching using a Chakra sensing technique. He was actually somewhat gratified to see Ryou release ten Chakra Threads all at once.
Although he himself had been squeezed dry, Ryou was indeed a genius in Chakra control.
As long as one is a genius in Chakra control, they are also a genius in Puppetry.
Ryou wasn't exactly disgracing Sasori's Puppetry.
But seeing Ryou use his Puppetry to control his puppet to perform such eye-searing movements, Sasori wanted to die on the spot.
Seeing this, Candy quickly released Chakra to keep Sasori in check.
Nekomata complimented against his better judgment: "Master dances well. I didn't expect Master to be a genius in the art of dance as well."
"It's just that I've never seen this kind of dance before. Is it a clan dance from the main family?"
Ryou nodded: "Old Demon Madara taught it to me. There's an anecdote behind this dance."
Ryou shook his head and then began to control the Third Kazekage to release Ninjutsu. Through the 'Third Kazekage User Manual' in Sasori's memories, Ryou naturally knew which Ninjutsu the Third Kazekage possessed!
Oh, right.
human puppets have another huge advantage: they don't need hand seals to perform Ninjutsu.
human puppets can retain the deceased's Chakra nature, Kekkei Genkai, and Ninjutsu activation methods.
In the original work, when Sasori controlled the Third Kazekage to launch large-scale Magnet Release, there were no hand seal frames for Iron Sand Drizzle or Iron Sand World.
When Sasori made the Third Kazekage, he had already set up the technique triggers within its Chakra core.
Sasori only needed to use Chakra Threads to match the password for each technique to trigger the Third Kazekage's Ninjutsu.
The Third Kazekage could be said to have been enhanced by Sasori.
His iron sand was poisoned by Sasori, and on top of that, he could release Ninjutsu without needing hand seals.
The Third Kazekage really ought to remember Sasori's kindness.