World Keeper - Chapter 27 The Tournament

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

[Attention, humans][Welcome to Midgard, a realm between life and death.][All 300 players accounted for!][Evaluation successful!]Jamie never expected his life to end while saving a stranger. One moment he was pushing a pregnant woman out of the path of a roaring truck—the next, he awakens in Midgard: a realm where death is just the beginning.He isn’t alone. Two hundred ninety-nine others, torn from their final moments, stand beside him. Their fate? To endure ten brutal trials that test body, mind, and spirit.Each challenge grants skills—swordsmanship, magic, strategy—that could mean the difference between survival and annihilation.And at the end awaits a choice:Reincarnate into a fantastical new world, carrying every skill earned.Return to Earth … alive, but powerless.But in a world where trust is fragile and every alliance can shatter in an instant, Jamie must decide—Is mere survival enough?Or will he fight for something greater?

Reborn in the Naruto world, Shin Uzumaki finds himself in the doomed Land of Whirlpools. As a member of the Uzumaki Clan! Trapped in a world filled with war, betrayal, and unimaginable power, Shin’s survival seems impossible.. Until it isn’t!![Ding! Replication System Activated!][Daily Login Reward: Common Replication Card.]​​​​​​​[Newbie Gift: Perfect Sage Body—​​​​​​​Adamantine Sealing Chains​​​​​​​—​​​​​​​​​​​​​​Four Symbols Seal​​​​​​​]With the power to Copy any Ability—whether it’s the Kekkei Genkai or Rinnegan or Forbidden jutsu—Shin begins his journey to dominate the Ninja World. [First task: Save Kushina and prevent the destruction of the Uzumaki Clan.]

Vainqueur Knightsbane is your average dragon: a giant, fire-breathing lizard who loves to take naps on his golden hoard, kidnap princesses for fun, and make the life of adventurers miserable. Vainqueur's only pleasure in life is to watch his treasure get bigger, one coin at a time.

So when a would-be thief turned unwilling minion tells him about "classes," "levels," and "quests," Vainqueur wonders if maybe, just maybe, he should consider a career change.

After all, why bother hunting monsters for free when you can get paid for it?