The Heaven-Defying System Takes You Through the World

This article is a mindless and refreshing article, not a holy article. The protagonist will kill and kill without mercy. In this article, the protagonist travels through time, acquires a system that defies the heavens, pretends to be cool and slaps everyone in the face, and killing people across levels is a trivial matter. What kind of sparks can be created in the world in a foreign land? I hope all readers will support it.