Treasure is something Boros can dip into, and while not every deck (or budget) extends to Dockside Extortionist, you do have other options
And with a burn deck that will remove the most efficient threats while also doming people to the face to draw cards, I would expect EarthquakeEarthquake to be the spell that clinches things pretty darn often
Even though there arent any more Masters sets on the immediate horizon, WotC has made it clear that they will continue to reprint expensive cards at every possible opportunity
Baldurs Gate Commander Precon Cards Youll Want To Grab These precons have some pretty good reprints
And finally, we have the Naya MTG Lands deck, Desert Bloom, led by Yuma Proud Protector
Hero of Oxid Ridge Here's another Mythic Rare with only one printing and a decade under its belt