Interesting item - This CD single for Unholy was marketed as a two part release. You would first buy this CD that included the single for Unholy, plus an extra slot for the then-upcoming Domino release. When the single CD for Domino came out, you were then suppose to put it in the empty slot, (the slot actually has a paper replica of the Domino CD single). I honestly have never seen a complete set of two - this was kind of a wonky attempt at marketing that clearly did not work. Regardless, this make sit a rather unique and interesting item.
Open, used condition.