Naruto: You Asked to Learn Puppetry, So I Turned the Anbu into Collectible Figures

[Hokage fan fiction + transmigrates as Sasori + genius schemer + ruthless killer + dark and rational + slow-burn power fantasy + puppet-building]

He wakes up as Sasori of the Red Sands during the Second Shinobi World War. His parents have just been killed by Konoha's White Fang, Granny Chiyo is consumed by grief, and the Sunagakure leadership is secretly scheming over the value of the orphaned genius.

Faced with desperation and hatred, Sasori doesn't sink into the false warmth of creating “Father and Mother” as he does in the original story. Instead, with the soul of a transmigrator and an absolute gift for puppetry, he sets out on a path of ruthless slaughter and the pursuit of truth!

From the start, at the Ninja Academy, he is a harmless-looking red-haired kid. He captures vagrants, implants parasitic threads in them, and removes their nerves to create perfect Human Puppets. He discards Chakra Threads and uses parasitic threads to take control of the dead's meridians.

Starting with his first Human Puppet, Sasori reaps the corpses of Iwagakure and Konoha soldiers across the battlefield.

“Since life is so fragile, I'll make the entire shinobi world experience the art of eternity.”

When the Third Shinobi World War begins, the Sunagakure genius everyone sees as a hothouse flower smiles and tugs at the Chakra Threads in his hands.

Behind him stands an army of Human Puppets made from countless Kekkei Genkai masters, blotting out the sky!