Vaynes Treachery Cheap black removal is always deserving of the top spot of a sets best black commons, and Vayne's Treachery is no exception
This generally wont be able to mill your opponent out on its own, so dont play it
The deck is much more Naya focused than 4C, but it stretches into the fourth color with the splash of blue in the sideboard for Hydroblast
This is a welcome boon in Commander games as it's highly likely at least one player has a couple of counterspells somewhere in their deck
If you're invested enough in Magic to be ordering proxies, you're probably sleeving all your decks, right
Also, Whenever a creature is put into an opponents graveyard from the battlefield, you gain life equal to its toughness. The rulings around MTG have changed since this card was first printed, and the short of that is that it actually affects all opponents, which makes it incredibly good at gaining you life