Appetite for Brains
Most discard spells leave the entire read to you: Thoughtseize, Duress, and the rest reveal the opponent's hand and let you take whatever hurts most. This one writes half the decision into the rules text. The mana-value-four-or-greater clause confines your choice to the cards a deck cannot afford to play without: the haymaker, the combo piece, the game-ender. You still choose among the cards that qualify, but the spell has already ruled the cheap stuff off-limits, so the only thing left to weigh is the top of the curve. Against a low-curve aggressive deck it does nothing at all, because there is no qualifying card to choose, and that hard whiff is the cost of the precision: it can never strip a one-drop in the matchup where the one-drop wins the tempo race. The exile clause is the other half of the design, slamming shut the recursion window a graveyard-fueled opponent would otherwise reopen. What it sells is a wager about which card kills you. It trades breadth (it cannot touch the early plays) for reach (it reliably pulls the expensive bomb that ends long games), making it the discard built for matchups where the danger lives at the top of the curve and the rest of the hand is noise.
