MTL - Chaotic Lightning Cultivation - ~ Section 816 defeats the soil

In the early world of immortal cultivation, there was no physical cultivation among immortal cultivators. And a top bodybuilder who came from the earth has opened up a new path here and became the ancestor of physical training.

- Description from novelbuddy

In a universe where the memory of Wisps has faded, one of these elusive beings finds itself amidst human society two billion years in the future. But what exactly is a Wisp? No one knows anymore. Join this whimsical and unconventional Wisp on a hilarious journey as it navigates an unfamiliar world, seeking its place and rediscovering what it means to be a Wisp.

An Individual from Earth finds themselves in the Shinobi World, equipped with a Scientific System. From that moment, he delved into scientific research far ahead of its time.

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!