Faceboob

If you like those genres (viking is a subgenre of folk metal), then you might like these bands:

Arkona (Russian)
Eluveitie
Elvenking
Equilibrium (German)

If you really want to experiment with folk, try Agalloch (Oregon band!). They're neo-folk mixed with prog-metal and doom metal.

While this is being derailed:
Can anyone recommend a good Power Metal band? I'm already listening to DragonForce

Use wikipedia

http://en.wikipedia.org/wiki/List_of_power_metal_bands

Moar pls

This thread...

sauce...

I'm assuming Seikon no Qwaser