Spell Blast

Tie the cost of the answer directly to the cost of the threat, and you get a counterspell that never goes dead and never blows anyone out. This solves a specific design problem from when blue was first being defined: how do you give the color a counter that stays live deep into a game without printing a hard answer that scales for free? The fix is to make X track the thing you are stopping. Countering a two-drop costs three mana; countering a six-drop costs seven. The rate is deliberately worse than the fixed counters of its era, because the appeal is flexibility across the curve rather than efficiency at any single point on it. That tradeoff has aged into a design footnote with a long line of descendants that share the X-cost-counter chassis: Power Sink leans on the same scaling math but punishes the caster with a mana tax; Syncopate adds an exile clause; Condescend bolts on a scry to smooth the floor. Each one bought back relevance by attaching a rider to the bare scaling cost. This card carries no rider and no escape clause, just the count and the counter. The descendants earn their slots because they do more for the mana, but every X-cost counterspell since is in conversation with the chassis printed here first.