The tracks here are an essential part of the Mercyful Fate story which all fans of their first two albums should seek out. That said, you should be bear in mind that all the songs on the EP are available (in a different sequence) on The Beginning, which is far more widely available,...
They don't expect Mercyful Fate to also be kind of proggy, in the way that they put songs together. Definitely they're experimenting with all different things. I've just been transcribing one of their songs, ‘Come To The Sabbath’, just writing out all th...