MERCYFUL FATE DON’T BREAK THE OATH OIS 12″ LP ALBUM VINYL Leave a reply “Mercyful Fate” is an influential Danish First Wave of Black Metal group who are often cited among the influences in the black metal, thrash metal, power metal, and progressive metal genres. They are also credited as a pioneering band of the first wave of black metal. Share this:TwitterFacebookLike this:Like Loading... Related