what would be the recommended scales and/or modes to use if you wanted to get a really dark and evil sound out of your music.Like that of a horror movie or bands like Opeth, Nevermore and Dimmu Borgir? no need to tab any scales out, just tell me the names and i'll look them up
2 days and not 1 answer? you guys suck

I'll give this one a go cuz I used to play in a slayer cover band.

The diminished scale sounds really heavy when used in riffs. The main use would be changing between the root note and the flattened 5th. This creates a dark sound which is very popular in metal.

D diminished scale:
D, E, F, G, G#, A#, B, C#, D

Another really good one is the harmonic minor scale.

A harmonic minor:
A, B, C, D, E, F, G#, A

Hope these help!
: )