Foresee

Scry 4 is the part that earns the surcharge over a plain two-card dig. Where a four-mana draw spell normally just hands you the top two cards and walks away, this one lets you arrange the four above them first, then draw into the half you kept. That is a deep bin: bottom the lands you are flooded on, the answer you cannot cast yet, the second copy of a card you already hold, and pull exactly the two cards the board state asks for. The sorcery speed and the four-mana price are the cost of that selection; you cannot hold it up as a reactive play, and you are spending a full turn to do it. What the scry buys is consistency rather than raw card advantage, smoothing the next several draw steps as much as refilling the current hand. It sits in a long line of blue card-selection-plus-card-draw spells that trade efficiency for control over what comes off the top, a design lever blue has returned to repeatedly because deciding the order of four cards is quietly one of the strongest things a deck can do without ever generating extra cards.