I firmly believe that given the soapbox that Sheldon and the other members of the Rules Committee have an article extolling the virtues of playing with un-set cards and a sincere personal recommendation to try it would have been enough
First, it became too easy to get to Night meaning that the bonuses would have to be very minor to be balanced
Despite being a misprint, this card was even rarer than the re-printed version, meaning collectors fell over themselves to snag one
If you follow either of those with a Goyf you can try and end the game while the effects of your discard still resonate hard
A couple of supplementary products that may include Commander-specific sets, other precons, or a holiday release
A mono-black deck won't have access to something like Golgari Grave-Troll, but it can still use Stinkweed Imp and Golgari Thug to give some punch to Songs of the Damned