Rushing River

Most bounce spells charge you mana for tempo; this one offers a second target if you're willing to pay in land. That trade is the whole design conversation. Sacrificing a land to bounce two nonland permanents is one of the rare kicker costs that hurts the controller as much as the controlled: you set the opponent back a full turn's development, but you also dig your own mana base a step backward, so the kicked mode reads as a gamble on whether tempo beats resources in this particular exchange. The unkicked floor keeps it honest as a clean single bounce when the board doesn't justify the land, which means it never becomes a dead card the way some pay-to-play kicker spells can. The structural cleverness is that it lets you spread the disruption across permanent types: two creatures, a creature and an enchantment, your own threatened permanent and a blocker, whatever the instant-speed window asks for. Planeshift's kicker cycle was built around the question of how much you'd pay to scale an effect, and the land-sacrifice answer is the most punishing of those costs, which is exactly why it produces the most decisive swing when it lands. It bounces, it does not destroy, so everything you send back can be replayed; the value is purely in the time you buy, and the land you give up is the meter measuring how badly you needed it.