Check the rest of the Austrian black metal syndicate >Leviathan
Check out the Black Twilight Circle movement in the States, also Weakling. >Bathory >Beherit
Blasphemy, Bestial Witchery, Diocletian, Bestial Warlust are good starting bands to get into war metal. >Mayhem
Tymah, Marduk, and Thorns. >Necromantia
Check the rest of the Greek scene, but not much compares. >Jute Gyte
If you want something weird, experimental, and something along those lines, Deathspell Omega after the first two albums, that are pure second wave worship, delivers.