I have no idea who Sisters of Death are, and their Bandcamp bio simply states, "You have been judged." When I did a google search, I got a 1976 film by the title of Sisters of Death with the tagline "Don't bother to scream. there's nobody to hear you...except your killer." So with little to go on, let's dive in and see what the judgment will be this time.
I suppose that the fact that I got a film in the search results is fitting, as the music here is cinematic and would be right at home in such a thriller. We open up with "Death," which is a chaotic piece with piano, pounding percussion, and droning bass atmospheres. There are weird synth noises that add to the unsettling feel. This is very well constructed and manages to use the piano and crashing cymbals and rumbling drums to give the entire thing an ominous feel. This is a jump scare that lasts 13 minutes, and I mean that in a good way. On "Fire," the elements are the same (piano, cymbals, droning atmosphere), but the feel is completely different. A piano note that intones periodically like a church bell, and crashing cymbals that punctuate the suffocating drone give this track a kind of heaviness that goes beyond the many layers of drone. If the first track was the fright, this is the moment right after, where you think that you are safe, but you are not quite sure. "Fear" keeps this same feeling going, but noisier. We add some xylophone and clarinet into the mix for a slightly whimsical feel that seems jarring when combined with the sounds of scrap metal being shoved around a dark alley, sparse piano, and sudden bursts of percussion. This is like the soundtrack to a Looney Tunes cartoon where Bugs Bunny has developed an insatiable hunger for flesh.... and he just acquired Elmer Fudd's shotgun somehow.... "Mortis" adds a pulsing bass drone that runs through the track like a malevolent heartbeat. This is a bit more sparse, with piano and drums making up the majority of the incidental sounds.
Overall, this is pretty good cinematic dark ambient. There is a lot going on in these tracks to keep them interesting. They are similar in feel, but manage to remain distinct with their own personalities. You can tell that they belong together, but they are not really the same. If you like it a little bit noisy and a lot bit oppressively dark, this is well worth checking out. This album weighs in at around 53 minutes.