I'm looking for a fan fiction i saw a long time ago, it's about a guy reborn as Guiche from Familiar of Zero. I remember he gets void magic and first travel to the world RWBY and start killing a lot grim because he has a system and wanted to level up, then he goes to harry potter world to get philosophers stone and brings a female version of harry to travel with him. last i saw he was in the world of Konosuba. Does anyone knows this fanfic?
Sounds like shit. Try reading a great fanfic like The Hill of Swords, Saint of Zero, Halkegenia Online...