This format has been fast and punishing, where I feel like every few games, I lose to a card I've never seen before on the bonus sheet
Gray Merchant of Asphodel Which mono-black card has ended the most games of Commander
Now, Ill admit, the Izzet control decks are taking a big hit this rotation losing many great lands and interaction, but Impulse is one of the better card advantage spells out there, and this is certainly something to watch
Then, the effect is one sided if you roll a 10 or more, which will be well worth the mana you spend
On top of that, it also has two additional modes, letting you snipe your opponents graveyards while generating advantage
BPhillipYork: Sort of fun but expensive and doesn't scale that rapidly