Question: The Invaluable Darkness is a live DVD by symphonic black metal band Dimmu Borgir, a Norwegian symphonic black metal band from Oslo, Norway, formed in which year?
Sentence (from "Dimmu Borgir"): The name is derived from Dimmuborgir, a volcanic formation in Iceland, the name of which means "dark cities" or "dark castles/fortresses" in Icelandic, Faroese and Old Norse.
Relevant evidence: No