MTL - Crazy Leveling System - Chapter 2901 Crazy attack

Crossing to One Piece world, he became Roger’s younger brother.

Always looked down upon by others, Ji Feng gains technology far more advanced than the present, as he discovers its abilities, he begins to walk a path far from ordinary. With X-ray vision allowing his to find jade stones in rocks. With this futuristic technology, Ji Feng accomplishes something no-one can compare to. This is the beginning of a legend.

- Description from Novelupdates

Travel to the world of One Piece?

They come, the security;

Became Don Quixote Rossindi?

Forget it, it can’t be reopened;

But after realizing that he had eaten the fruit of silence, the little boy became restless.

Fruit of Silence, this is one of the devil fruits that can compete for the title of “the most useless” in the world of One Piece; it is only a little better than Chopper’s “Everyone’s Fruit · Common People’s Form”!

“Dover, you said you are a devil fruit wholesaler, why do your family eat all kinds of weird ones?”

Facing the bewildered little Dover, Rossindi patted his forehead.

“Forget it, let’s practice domineering hard.”

- Description from novelbuddy

After his death, Hang Qing got a system that allowed him to release the halo of Gary Stu (aka. Mary Sue) and conquer the villain in every world.

“You have an unparalleled appearance, a charming body, an irresistible voice, is conquering a villain that difficult?”

“…………… But I’m a f*cking man. “

“It doesn’t matter getting bent a little, you’ll get used to it.”

King of Swimming: √

Cold Singer Pop Star: √

Murder Movie Abnormal Boss: √

Most Beautiful Alpha: √

Ghost Imprisoned in the Castle: √

- Description from Novelupdates