I don't know if Acid Tech Psy is a thing, but that's pretty much what this is.

I actually kinda scared myself with this track. Not so much because King Sombra strikes me as a particularly intimidating villain, but because the mood is so hopeless. Almost like Union Jack's No Life Can Survive Here, but with ponies.

Thank yous:
MLPTF2 Mods once again for having such a vast library of vocal only show audio.
http://www.mlptf2mods.com/
Baxtermega for allowing me to use his wallpaper, Infection of Darkness
http://baxtermega.deviantart.com/art/King-Sombra-Infection-of-Darkness-Wallpaper-339617307
The makers of MLP Friendship is Magic for everything they do.

Downloads:
320kbps MP3: https://eqbeats.org/track/3762

Featured on:
Equestria Daily - http://www.equestriadaily.com/2012/12/music-crystal-beware-of-sombra-shadow.html