Make Legion of Doom's Kingdom of Endless Darkness a priority. It's my third favourite Greek black metal album after the debuts by Rotting Christ and Varathron.
You guys really need to check this band out if you haven't already. Unfortunately they have a mere 2 demos with a total of 5 tracks all up, but it's all absolute quality and I rate them up there with the greats. Shame they never made a full length.