Force of Virtue and Sunscour use white cards in your hand and are mana-less ways to have a massive impact on the game
It scales up the more foes you control
This means you can get the ability going as soon as Choco drops, and can hold it back to keep your card advantage engine safe
Im not a believer in proliferate as a reasonable way to build around energy, so Im very skeptical even of the best proliferate cards, including Atraxa, Praetors' Voice, even though Atraxa seems to have been the most popular energy commander until recently
In the vast multiverse of Magic: The Gathering , no format has captured the hearts and minds of players quite like Commander
The budget-friendly versions of this exact effect are dirt cheap and stack: Marauding Blight-Priest ($0.25), Epicure of Blood ($0.34), and Defiant Bloodlord ($0.39)