Toaru Majutsu no Index: Genesis Testament - Volume 4, Prologue: A Picture Book that Slipped through the Cracks – Magic_Side,Open.

Xueyue's life was filled with nothing but unfortunate events. Her mother died giving birth to her, her father abandoned her for another family, her stepsister stole her beloved, and she was framed for a murder she didn't commit.
Sentenced to death by beating, Xueyue thought her horrible life would finally end.

One god, one faith, one world, one mage… I am the only mage in the world.

- Description from Ptwxz (translated)

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

drop out of school

When I got home, I reopened the blacksmith shop.

From then on, this blacksmith shop was no longer ordinary.

The best knives in the world are born here.

The thrust-to-weight ratio of the handmade micro-turbojet directly exploded.

The micro-drones flourished in his hands.

- Description from novelbuddy