Question: Who founded the metal band who's retrospective box set of albums was entitled Trolsk Sortmetall 1993-1997?
Sentence (from "Trolsk Sortmetall 1993-1997"): Trolsk Sortmetall 1993-1997 is a retrospective box set of albums by Norwegian black metal band Ulver, issued in 2014 via Century Media.
Relevant evidence: Yes