Mestelexil the Box of Desperate Knowledge is an extraordinary construct created by Kiyazuna the Axle. Fully sentient and capable of infinite regeneration, his childlike demeanor belies world-shaking combat prowess.
He utilized Word Arts that had arrived at the realm of ultimate existential truth, capable of composing his very own existence. He endlessly grew, with each cycle of death and rebirth granting him knowledge from a foreign world. He could regenerate one as long as the other lived, with both of them incapable of being killed simultaneously. A combat life-form truly flawless, proven invincible by forgone logic.
Creator/Architect. Golem/Homunculus.
Mestelexil the Box of Desperate Knowledge.