Ob Nixilis of the Black Oath Ob Nixilis of the Black Oath gets a low rank, largely because mono-black commanders are limited and not all that popular, and this particular Ob Nixilis doesnt have any great abilities to make up for its color identity restriction
While this is technically interaction, it puts all the control in the hands of your opponents as they get to choose what to sacrifice and discard - they will probably choose the options which are best for them
However, its currently pushing $15, and if thats too high for the ethos of the decks, I could see this doubling
I could probably come up with some post-hoc theory that explains all of this, but I'll leave that as an exercise to the reader (send me your best theories here, or in the comments below)
Anyway, back to the article, and those juicy Japanese Pokemon cards
2015 Core Set Prerelease Pack - Hunt With Strength $59.99 US Shipping Only Due to export restrictions, this item may only be shipped to addresses in the United States, APO/FPO addresses, and Puerto Rico