Shattering Pulse

Buyback turns a single answer into a recurring tax. The base spell is a plain artifact-destroyer, but paying the surcharge reshapes it into a per-turn threat: the card returns to your hand on resolution, ready to do the same thing next turn for whatever mana you can spare. Against a deck leaning on artifacts, that converts one card into a soft lock, a standing promise that anything they deploy gets unmade, with the only real cost being mana you would otherwise spend developing your own board. The design discipline lives in that surcharge: at full price the loop is slow and mana-hungry, which keeps it from being free disruption, and because the spell still goes on the stack each time you cast it, an opponent can answer the loop by countering it (and a countered buyback spell does not return to your hand). That keeps the engine honest. The strategic axis is attrition, not tempo: a way to grind out an opponent's artifact base across a long game rather than blow up a single piece and trade down. The instant timing matters too, letting you hold the loop open to destroy an artifact before it can be tapped for value or simply wait for the most punishing moment to repeat the destruction. Among the buyback spells, it expresses the mechanic's core asymmetry as cleanly as any: a removal piece that refuses to die with its target.