Basicaly blackened DM band which sounds something like Maze of torment,Babtisim by fire and Lashed to the slave stick fused together..maybe even a bit of early Mayhem influence

Know any underground bands that fit that discripton?

DEATH METAL HELP THREAD.

Ugh.

But to answer your question, I would recommend pretty much any old-school death metal band. Back in the late 80's/early 90's the dividing line between thrash, death, and black was not as clear as it is today, and you found many bands who played all three. I would recommend Baphomet's The Dead Shall Inherit and the early Master demos... But my highest suggestion would be Darkthrone's Soulside Journey. It's a blackened death landmark.