Mana Breach

A symmetrical land-bounce tax dressed as fairness for the entire table, and the trick is that the symmetry is a lie. Every cast triggers the same toll, but the player who built around it pays a price they can afford while the opponent pays one they cannot. The classic shell pairs it with a low curve and cheap or free spells, so the controller keeps developing while the other side spends each turn replaying the same Island. It is a prison-on-tempo piece in the tradition that resource-denial enchantments like Winter Orb later refined: not a hard lock, but a grinding asymmetry that compounds every turn the opponent tries to advance. The bounce hits a land of the caster's choice, which is what makes it cooperate with you and work against them (you replay something you no longer need this turn; they often must replay a land they were counting on). The structural weakness is the mirror of its strength: it does nothing to a player who simply stops casting spells, since the trigger needs a cast to fire at all. It taxes the first spell of a turn as readily as the fifth, but it only ever taxes spells, so a board already built or a plan that no longer needs the stack walks past it untouched. That is the shape of a card that reads as evenhanded and plays as anything but.