Marduk is awesome!  I could listen to that band all day!  Morgan Steinmeyer Håkansson formed it!
I've never listened to them before, they must be a foreign band?
Yes, they are from Sweden!  They are a black metal band
That's awesome. I have heard of multiple metal bands coming from Sweden, that sort of music must be popular over there!
a fast and intense form of black metal. 
Marduk's predominant lyrical topics are Satanism, anti-Christianity, blasphemy, death, Third Reich history, and World War II. The latter two are a later addition to their lyrical/conceptual themes, stemming from their 1999 release "Panzer Division Marduk". Marduk have recorded further songs relating to those chapters of human history, such as "The Hangman of Prague" (moniker of Reinhard Heydrich - second in command of the SS - in his capacity as the "
Abruptum
Abruptum is a black metal and dark ambient solo side-project band from Sweden. It is run by Evil (Morgan Steinmeyer Håkansson) of Marduk, but the band was formed in 1989 by IT (a.k.a. Tony Särkkä). All (a.k.a. Jim Berger), Ext and Evil joined the band later. IT was one of the leaders of the True Satanist Horde, part of the Swedish Black metal scene. Euronymous, co-founder of Mayhem and founder of Deathlike Silence Productions, described Abruptum as