Frantic Search (T1, Ext, S) Frantic Search works fabulously with any deck which has lands which tap for more than one mana, including High Tide and Tolarian Academy decks
But now one deck is effectively converting most of its mana into this second, independent resource, which is almost as flexible in what it can buy but which DOESNT have that tricky use-it-or-lose-it restriction
Online card shops may charge a premium for certain cards, particularly if they open new packs to acquire them
Things like Massacre Wurm or Sheoldred, Whispering One come to mind
Nahiri, the Harbinger I like this more than the other Planeswalkers because this does things Boros doesnt necessarily do that well
But I would much rather have this effect on a free land, like Rogue's Passage