I Become Invincible By Signing In - Chapter 156 - : Slaying a Connate Expert (1)  

Shennugou is an old and infertile place. It’s hard to find a woman to marry here.

A novel revolving around being transported to another world with an op system. The mc spends his day chasing skirts and doing missions to level up. A standard journey to the top with lots of girls from various animes and games with a twist of that gaming feel (hunting mobs, doing missions).

- Description from novelupdates

Fade was a legendary assassin that could kill just about anyone, as long as the price was right and the reason was just.

One day as he was reminiscing about his life when he lost someone important, he fell asleep. When he woke up he was in a weird place, a different body, a different world.

Su Yao passed through and traveled to the Marvel world to become a mutant. He was still in the experimental base. He expressed a little panic…

Fortunately, at the critical moment, the mutant ability ‘imitation’ was awakened to imitate the opponent’s ability!
…
Imitation object→Orochi (title: Sun God, Will of the Earth)
Imitation object→Wanda (title: Scarlet Witch, owner of chaos magic)
Imitation object → Sun God…
…
Professor X: “We must find him as soon as possible and guide him to control his power to avoid causing irreparable disasters!”
Magneto: “You are my child???”
Thor: “Brother?”
Loki: “?”

- Description from novelbuddy