After Transforming, I Decided to Kill My Brother and Sister

[Transformation + Magic + Scheming Protagonist + Single + Cuddles + White-Haired Loli]

Lorin was one of the foremost black mages on the continent of magic, and his power was the stuff of legend. With unrivaled talent and wisdom, he created a devastatingly powerful black magic spell, the strongest of its age, capable of laying waste to heaven and earth.

Yet great power often comes at a terrible price. The spell's side effects far exceeded his expectations. During one casting, its terrifying backlash completely destroyed his body, leaving only a lonely soul to wander the world.

Fortunately, he knew the art of reincarnating a soul. After a long and arduous search, he finally found a suitable vessel. But when his soul settled inside it, he couldn't help feeling both amused and exasperated. This body was nothing like the one he'd imagined.

From then on, a legendary figure appeared on the continent of magic: Lorin. Who could have guessed that this seemingly delicate little girl possessed extraordinary magical abilities, was invincible in battle, and would become the new legend of the continent of magic?