This is, in that sense, a brand new trend
Show of Confidence is essentially a conditional Storm card, and like Storm decks, this deck often looks to win with one big turn
Best for Gameplay: Format-warping spells like Force of Will (Legacy) and Ancestral Recall (Vintage) are considered "best" because they force opponents to build decks specifically to answer them
With the creature type Knight and with good Black aggro decks floating around, I can see this being played a lot
After all, what were you going to do with all that mana anyway, besides draining your opponents for X
All that copying will lead us to putting in a Stripe Mine, though (since theyre cheaper to come by than Wasteland and I definitely have extras laying around)