[quote=@Oblivion666]
[@Onarax] Is your magic based off the countries from Final Fantasy Type 0? I swear those sounds so familiar.
[/quote]

So after some quick googling, it appears the countries in Type 0 are based on the same source as Rei's magic. Namely the Chinese concept of Wu Xing. 

https://en.wikipedia.org/wiki/Wu_Xing

It's basically the Chinese concept of the Five Elements kind of similar to the Western Concept of Four Elements. Each of the Beasts symbolize a bunch of different things. You'll find that the idea of Wu Xing pops up everywhere: Shin Megami Tensei, Beyblade, Digimon, Final Fantasy, heck even Voltron. 

Which is why it all probably seems so familiar.