12 Before I post more chapters [What Magic should MC learn in Black Clover world]]

I want to know what is the most powerful magic in Black Clover and Fairy Tail. Of course I know some of them but I would like to see what you guys come up with. Maybe even fuse some magic.

Also the MC will start using his system next chapter.

[IMPORTANT]: Should the MC lose some magic/powers I think he is OP as hell right now. Maybe I can put some restrictions on his System he is close to Wizard King levels already lol.