Twilight of the Strange Gods

A commoner boy transmigrates to a future world where martial might reign supreme. He awakens a "physical body" ability that everyone looks down on, then builds up points by slaying monsters, deduces martial techniques, and inherits the legacies of myths and legends. He fights his way from the slums to the source of the dimensional gates, ultimately ending the reign of evil gods and foreign races as a "Martial Sage," and reclaiming the human world for humanity.