All of
Mercyful Fate's potential was fulfilled on Don't Break the Oath, a doomy, gothic collection of post-
Priest/
Maiden black metal preoccupied with Satan and the occult.
Hank Shermann and
Michael Denner keep their progressive rock tendencies reigned in while still delivering plenty of the neo-classical feel that gives the music its atmosphere, and
King Diamond uses his vocal range to great theatrical effect.
Fate's sound and attitude were highly influential on later gothic/black metal bands, especially in Europe, and Don't Break the Oath consistently encapsulates their appeal. ~ Steve Huey