Toaru Majutsu no Index SS - Volume 2, Chapter 16: There is a Reason They Do Not Look Like Mothers. The Fifth Friday of September.

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

Five billion people in the world traveled to the killing world at the same time!

There were tens of thousands of races and demons here!

The law of existence was killing!

Endless killing!

How could humans find an opportunity to save the blue star in the killing world?

Dick activated the talent plundering system!

Congratulations on your gaining the level C talent, rage!

Congratulations on your gaining the level B talent, element!

Congratulations on your gaining the level A talent, space!

Congratulations on your gaining the level S talent, time!

Congratulations on your gaining level SS talent, retract!

Congratulations on your gaining level SSS talent, creating creatures!

Since then, Dick had embarked on a path of endless harvest.

After being wrongfully accused and killed, a young man reincarnates into a superhuman society as a third rate villain named Don, whose biggest asset is his side-kick with mental issues. With few options available to him, Don accepts the mantle of his predecessor and must now not only survive in a new and dangerous world, but also conquer it....**Congratulations, you have died and awakened the Supervillain Idol System.****The path to fame, fortune and world domination is yours is take!!**

There was a time where I was summoned to a different world. I spent more than a year as a Priestess from a different world. I fulfilled my role and decided to return to my original world. Before leaving, I confessed my feelings to my escort knight. And from there I was heartbroken. After returning to the original world for a year and half, I was summoned again. What? Apparently this time, nobody summoned me. I was sent out to a great extent and have a lost love. I cannot face anyone now! No one knows that I was a former Priestess and I can only quickly return to my original world. Even so, it does not seem to work out very well…