Ka‘s voice sounds like the smokiest parts of Guru, Tricky and Raekwon’s vocal chords were marinated in a barrel of Scotch for about half a century before being committed to tape. Roc Marciano is probably one of the only MCs out here who can match him for pure gravel and the blunt impact of to-the-point rhymes. So it’s only fitting that the two square off on “Iron Age” this latest video from Ka’s Grief Pedigree (watch below–I do believe at this rate he’s going to self-direct a video for every one of these things). And that’s not the only things the indie vet has been up to on his busy-being-reborn program. Catch up with some of his other activities (talking boombox science with TDK and performing live at Public Assembly here in Brooklyn, for two) after the jump.