dimmu are not death metal
dimmu are Melodic Black/Symphonic Extreme Metal
and there is no such thing as norwegian death metal since the thing norwegia is famous for is black metal.
there is swedish death metal wich is called Gothenburg
and in flames used to be Gothenburg/Melodic Death Metal
too bad they changed their style
you are thinking of Mayhem,although varg wasnt a member of the band when he killed Euronymous
again,no such thing as norwegian death metal
and if you do like emperor and immortal you should try Enslaved - "Vikingligr Veldi"
and back to topic
Korpiklaani - Tervaskanto http://youtube.com/watch?v=7H0_7YPoU3Q