Spell Contortion

The base mode is a soft tax with a wide window: the spell resolves unless its controller pays two, which late in a game asks almost nothing of them. The kicker is where the design lives. Each additional payment of one and a blue raises the floor (you draw a card per kick whether or not the counter sticks) and bends the card from pure interaction toward card advantage. You are never buying only a counter; you are buying refills priced against your open mana. That dual function softens a real failing of tax effects: a Force Spike the opponent simply pays is a dead card. Here, a kicked one replaces itself several times over even when it fails. The cost structure rewards holding it until you have surplus mana rather than casting on curve, since every blue past the first is worth a card. The tension is at both extremes. The worst case is genuinely bad: cast unkicked, met with two mana, it does nothing at all and cantrips for nothing, because only the kicker draws. And as a hard answer the floor stays low no matter how many times you kick it; against a spell you must stop, two mana is rarely a wall, and a fistful of fresh cards is cold comfort if the thing you let through wins on the spot. This is a counterspell that wants the game to have already slowed down enough that paying for cards is the point and stopping the spell is a bonus.