Icefall

Stone Rain with a tax attached, repriced for a different role. Land destruction has always lived in red's anti-keep-up toolbox, and the standard rate was three mana to set an opponent a turn behind on lands. The extra mana here buys flexibility (artifacts come into the target line) and, more interestingly, recover: when one of your creatures dies, you can spend to buy the spell back from the graveyard instead of losing it to exile. That clause turns a one-shot tempo play into a recurring drain on whatever resource you keep aiming at, but only if you are losing creatures, which is the design's quiet honesty. The mechanic ties recursion to attrition: you do not get the rebuy for free, you get it as a consolation for combat going against you, and you have to choose between paying the tax now and saving the mana. Stack a few of these against a permanent base and the graveyard becomes a slow-feeding engine that punishes a board stall as much as a race. The price of all this is the front-end rate: four mana to destroy a single land or artifact is steep on its own, so the card only earns its slot when the recover loop is live and the creatures are dying anyway.