Scattered Thoughts

The trade is filtering measured in graveyard fuel. Four cards seen, two kept, two milled: this is a dig that pays its own way for any deck that treats the graveyard as a resource rather than a loss, since the two cards that miss your hand land somewhere you can still use them. That instant-speed clause is the quiet part doing the work; you can hold up the effect through an opponent's turn, restock at end of step, or wait to see whether the game develops before committing to which two of four you take. Compared to the sorcery-speed card-selection that usually comes attached to graveyard synergies, the freedom to fire on any turn changes the sequencing math considerably. The cost is real: at four mana for a spell that adds no immediate board presence and nets a single card of raw advantage (two drawn against one spent), the rate only justifies itself when the two cards headed for the graveyard have a second life waiting. Flashback, delve, reanimation, escape, any payoff for a stocked yard turns the "downside" into setup. Without that scaffolding it is an overpriced double-dig, which is precisely why the card reads as narrow: it is engineered for the graveyard-value shell and does little outside it.