[casthaven]Elspeth, Knight-Errant[/casthaven]
Even without more one-drops, a couple more high tier two-drops could make all the difference
With a Mardu card in the Command Zone instead of a Rakdos one, youre free to splash for Priest of Fell Rites and play bombs like Iona and Ashen Rider that you otherwise wouldnt have access to
They're a huge hit, and because of that, Borderless Raised Foil cards in Bloomburrow are by far the most expensive
Youll still want a nice bell curve of mana costs in your cards, but unless youre playing cEDH (competitive EDH, a hellscape where games end before youve even finished shuffling - fun, but in a horribly different way), you can have a bit more fun
Weve seen how powerful this effect has been in recent sets with Attune with Aether and Traverse the Ulvenwald, and Flower is just as good as the other two