The Achievement Junkie - Chapter 2 Me, A Hero?

Kyo Mazuru traveled to the world of Bleach and landed in the forest of Menos Grande at the beginning.Picking up a asauchi left over from Shinigami's death, and starting with a sword, he spent hundred years in the forest of Menos Grande to survive, slashing countless hollows, and his slashing skills reached the peak, until one day, he met a man who claimed to be Mr. Aizen Sōsuke!Mr. Aizen couldn't bear him to live alone in Hueco Mundo, so he invited him out of there and brought him to Soul Society!After that, Kyo Mazuru's Shinigami career began!

When a dead Ninja meets a Fenton things become explosive. Watch Danny strive to complete the tasks before death gets to him or his world is destroyed.Disclaimer: I do not own anything

A teenager named Evan Mason was reincarnated into the magical world of Harry Potter and goes to school at Hogwarts!
With only his knowledge of the future and great talent for magic, he takes the path towards the top of the magic world, only to realize that ever step he took, changed everything!

- Description from Novelupdates

“I got transmigrated into a novel because of a bad review?”

Eren found his life turned upside down when he woke up as the character that he had just finished cursing in a negative review!

Not only had he been reborn as an antagonist that he hated, but he was an Elder at a Devilish Sect?

It would've been fine if that was the only problem, but that was just the beginning as he remembered that the Character was a spy sent into the Devil Sect by the Mythical Hero Academy... A character that died within the first fifty chapters?!