Kingdom Building: Civilization Starts with Divinity - Chapter 25 - : Showing Off!

Naofumi Iwatani, an uncharismatic Otaku who spends his days on games and manga, suddenly finds himself summoned to a parallel universe! He discovers he is one of four heroes equipped with legendary weapons and tasked with saving the world from its prophesied destruction.

As the Shield Hero, the weakest of the heroes, all is not as it seems. Naofumi is soon alone, penniless, and betrayed. With no one to turn to, and nowhere to run, he is left with only his shield. Now, Naofumi must rise to become the legendary Shield Hero and save the world!

A boy wakes up with omnitrix as a X-GENE

A failed investor from 2017 got drunk and woke up in the 1980s. China is just opening up, and the economy is blooming. There is also the dissolution of the Soviet Union, the bursting of the Dot-com bubble and other financial crisis. He used his knowledge of the future and slowly build up his empire.

- Description from novelupdates

Kyros was no hero—nor was he a villain. A pragmatist to the core, he turned Earth into a chessboard of chaos, bending nations and empires to his will before meeting his end. But death was only the beginning. The Devil intervened, pulling Kyros into Hell with an irresistible proposition: a second chance at life in a world far removed from Earth—a world named Neva.In this fantastical realm of knights, nobility, magic, and divine power, Kyros becomes the key piece in a wager between God and the Devil. Reborn as Rasmus Blackheart, a disgraced young noble, his task is clear: unleash chaos and topple the order of Neva, just as he did on Earth. But the Devil has added a twist to the game—he’ll serve as Rasmus’s companion, not as a guide but as a mischievous, manipulative force, more likely to hinder than help.Navigating a world brimming with intrigue and divine interference, Rasmus must survive, scheme, and rise from ruin to reshape Neva in his image. Will his cunning be enough to outwit his foes—and his so-called ally—or will this chaotic partnership lead to his downfall?