I Roam the Mortal World, Slaying Demons

(All handmade, no System, not a clueless protagonist)

Lu Fan finds a broken pocket dimension that can slow time, refine souls, and never gets full.

When his nation is on the brink of destruction, he rides out alone with only his sword and crushes a million-strong army.

When his sect is about to fall, he fights above his level as a menial disciple and overwhelms tens of millions of cultivators.

From then on, he soars through the skies and roams the mortal world, slaying injustice and every demon, monster, and ghost in his path.

Until that pocket dimension begins devouring the universe...