"Campione" (also known as "The Testament of Sister New Devil") is a Japanese light novel series written by Taku Motoyama, with illustrations by Saten Tsukui. The story revolves around a young man named Bisco Hattori who gains the title of "Campione" (Godslayer) after defeating a god. He then gets involved in various supernatural events and conflicts.

The term "弑神者" (shisshinsha) literally translates to "god-slayer" or "killer of gods" in English. This term can be seen as a direct reference to the main character's role as a Campione, who has the power to defeat and usurp gods.

So when you say "Campione弑神者", it essentially means "Campione, the God-Slayer". This combination emphasizes the protagonist's unique status and abilities within the story.