Set Adrift

Tempo's least efficient stall, repriced by a mechanic that wants you to spend your own graveyard. The base effect is a bounce that lands one card deeper than a hand-return: instead of handing the permanent back, it buries it atop the owner's library, taxing them a full draw step to see it again. Six mana for a soft answer reads as unplayable on its face, which is exactly why delve is bolted on. The graveyard becomes a discount engine, and the spell shrinks toward something castable, sometimes for a single blue if the fuel is there. That is the standing tension: every card you exile to pay for it is one you can no longer flash back, reanimate, or otherwise recur, so the discount is never free. Tucking one card deep is a delay, not a removal: the opponent draws it again next turn, so this is no answer to a permanent you need kept off the table for good. What it buys is a single turn against the thing you most need a turn against: a planeswalker one activation from its ultimate, an attacker whose swing you cannot otherwise survive, a permanent whose immediate presence is the problem. Within the delve family it sits at the modest end, its graveyard appetite checked by a payoff that only ever rents time rather than closing the game.