[quote=@TheWindel]
Sadly I have not. Is it like the Norse Mythology?
[/quote]

Nope you gotta see it man, one of the best animes I've watched, it's normal like Akuma no riddle, but has a lot of badass moments along with funny ones. 

[url=https://www.youtube.com/watch?v=kcU2S-BbmBQ]Here's a clip[/url]