My personal choice would be Draconic Domination, simply because I like playing with dragons
Evelyn, the Covetous The ability to play your opponent's cards is always a premium ability, and Evelyn, the Covetous just bakes this card advantage in
There is also a powerful Mono-Black Artifact matters brew in the Warhammer 40k Commander decks
Many people would buy a legal Lutri as it goes alongside every deck with red and blue in it
Is Arasta a card that I'd recommend for most Green decks
Pluto, Guard Dog The Best Dog Just Got Even Better Amber Steel players rejoice, as an undamaged Pluto, Guard Dog can provide protection for your low cost, low Willpower Amber cards while also providing some much-needed Strength early on