Is not. It's so not true that Lich King is a joke band and shouldn't be taken serious in any context like Dethklok.
The riffs are cool in the song, except that black metal riff sucks ass.

Also Black Metal is old school as I was listening to the song he says "were from the 80s were old school" (Untrue) They fancy themselves oldschool. The end of the song is BAD black metal. The rest is a good song.