Arcane Infusion

The exile-locked encore built into the cost is what makes this more than a filtered dig. Two mana buys a look at the top four, but the reveal is narrow by construction: only an instant or sorcery comes back, and everything else goes to the bottom in random order. This is a spellslinger's velocity engine dressed as card selection: it wants a deck where every hit off the top is another spell worth chaining, because it refuses to hand you a creature or a land to soften a whiff. Miss on the four and you have paid two mana to shuffle your top into the basement. Flashback is what pays that risk forward. The first cast, at instant speed, holds up on an opponent's end step to refuel; the second, from the yard at , converts a spent card into a fresh selection late, when your hand has thinned and every draw counts. The structural elegance is that both halves respect the same restriction, so the payoff scales with how disciplined the spell count is rather than how greedy the deck gets. It is a dig spell that only rewards decks already committed to the plan it enables, and the exile clause is the ceiling that keeps the graveyard cast from becoming a bottomless loop.