A top contender in Pioneer right now, winning two Magic Online challenges in the past two weeks, mono blue spirits has always been a bit of a budget deck that plays out at a premier level. Once again, given the single color of mana, you can manage the entire mana-base for this deck, even with Snow-Covered Islands costing almost a fourth of the overall budget.
Once we move on from the mana-base, Brazen Borrower is the only card you can’t get while remaining within budget. While I’ve an extra Spectral Adversary and Spell Pierce to the main deck, there aren’t too many poor choices you can make in exchange for Brazen Borrower. The difference between this budget deck and the current tier 1 aggro-tempo deck is just two Brazen Borrowers, so if you already own those, this is a slam dunk pick up for any tempo players from other formats.