Marvel: I'm a Symbiote - Symbiote 0220: Subordination

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

Upon meeting the girl who would become her adopted younger sister, the duke’s daughter Christina regained memories of her previous life. Through those memories, she learned that her new sister, Mishuli, was the heroine of a certain story. And though the story depicted a Christina who abused her sister, the real Christina turned into a siscon who spoiled Mishuli to no end.

Arsene Academy – the best educational institution on the continent.

A place that’s famous for nurturing many talented people.

A warrior from a barbarian tribe enters the academy.

“Son, do you know what this is?”

Thanos raised his golden gloves, and the six Infinity Stones shone with pleated radiance: “If I snap my fingers, you will turn into dust in the wind.”

“Dad doesn’t believe it.”

Fang Mo, who was wearing an endless suit, slowly shook his head, and pointed the Universal Sword in his hand at Thanos Nawa’s bright purple head: “Don’t talk about the Infinity Stones today, even the Heart of the Universe can’t save your dog’s life!”

“Do you know what this is? This is the begging jade!”

Madara Uchiha stood in mid-air and laughed wildly: “It is the strongest spear and the strongest shield, there is nothing it can’t destroy!”

“You really haven’t seen anything hard…” Fang Mo took out a piece of bedrock with a grinning smile: “Dare you dare to compare with it!?”

“Is this… the Sage’s Stone?”

Edward stared blankly at the red crystal in front of him: “Can it ignore the law of equivalent exchange?”

“Well, in a sense, it can only be regarded as the basis for an equivalent exchange.”

Fang Mo touched the portable conversion table in his hand: “But if you want, I can consider sending you a set.”

…

When the fourth natural disaster met the mysterious island module, the cube man finally began to bring disaster to the world.

(To reiterate, the stand-in is Steve, the protagonist of Minecraft, not Captain America, this is the MC text…

- Description from novelbuddy