Transcendent Dragon

Counterspells that convert their target into your own resource are an old idea: Spelljack tucked the exiled spell under a shell for later, Desertion peeled a creature or artifact off the top of the countered spell. What this dragon does is fold that theft into a body you can flash in as an ambush blocker or an end-step threat, and then cast the stolen spell for free on the spot rather than banking it. The "if you cast it" clause is the discipline here: reanimate the dragon or blink it and you get a 4/3 flier with no theft attached, so the free spell is a reward reserved for playing the card the honest way, off six mana at instant speed. That timing is the whole leverage. You hold up the counter as interaction, and when it connects you are not spending a card to say no; you are spending it to say yes on your own terms, redirecting an opponent's removal at their board or an opponent's ramp into your acceleration. The 4/3 stat line is modest for the cost, but the body is almost incidental: it exists to carry the trigger onto the battlefield and to leave something behind after the counter resolves. As a piece of blue midrange, it collapses two turns of "counter now, threaten later" into a single flashed play.