Zither Emperor - Volume 1 Chapter 6.1

Orodan was an orphaned street rat who clawed his way to the county militia with hard work. However calamitous events unfold and draw him into events bigger than himself and Orodan's battle-loving disposition leads to a warrior's death for him. Only for him to wake up again on the day of.In a world of skills, titles and blessings; a smart time looper would perhaps scheme, plan, amass equipment and allies. But not Orodan. If there's one thing he's good at it's stubbornly trying the same thing over and over again via brute force till it's done.If a wall is in front, going around is not an option. Instead batter it with your head thousands of times till either the wall breaks or you do. And gain skill levels along the way

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

Yuki, a high school junior, dies heroically saving a stranger and is reincarnated in a fantasy world, where he discovers an extraordinary and unrivaled power.