On Scum Terror, Seraphim Slaughter play a well pulled off combination of raw black and thrash metal with a punk attitude that genuinely sounds as if it's from the late 80's/early 90's era of black/thrash metal; lyrics about sex, alcohol, violence and Satan, fuzzy guitars, tape hiss and raw, trashy-sounding, cymbal-smashing drumming. Just looking at the song titles and album artwork give an accurate picture of the music within: raw, dirty, old-school anarchist punk influenced music.
The sonic delivery of the music is a lot like early Darkthrone: lo-fi drums buried under trebly buzz-saw guitars. The music itself sounds like a tighter collection of the early Brazilian black/thrash acts, as well as a thrashier, more violent modern Darkthrone. The music itself is pretty simple; apart from the slower, atmospheric intro to the title track, guitar work is primarily made up of buzzing tremolo riffs and straight thrash metal power chords played at fast and occasionally mid paced speeds, backed by almost incessant cymbal bashing and blast beats. Vocals are screamed as viciously as possible, sounding like Transilvanian Hunger-era Nocturno Culto, but with more punky aggression. For the most part, the music is extremely dirty blackened thrash metal, though there are occasionally slower, more atmospheric and melodic moments, like guitar noodling scattered throughout 'I'm the Unholy Motherfucking Master' and the intro to the title track.
I can't emphasize enough how much the lyrics mirror the music; throat desecrating screams of 'Die you fucking scum' and 'Cervix ripping sex' and lyrics dealing with AIDS reflect the lo-fi, filthy repetitiveness of the music on Scum Terror. Serpahim Slaughter are great at what they do, which is play raw, thrashy black metal that would fit perfectly into the late 80's; if they were to go back in time and form in 1985 in some proto-black/thrash metal scene or other, they wouldn't seem out of place in the least.
Don't buy Scum Terror with the expectation of really technical or unique inventiveness. If you're wondering what happened to the raw, violent blackened thrash metal from the 1980's, stop wondering and check out Scum Terror.