Quandrix, the Proof

Cascade normally works exactly once: cast the oversized carrier, roll the dice, cast the free spell beneath it. This Dragon takes that single lottery pull and hands it to every instant and sorcery you cast from hand for as long as it survives, converting a one-time value burst into a repeating one the whole deck compounds. The design problem it resolves is that cascade rewards expensive spells: the cheaper the trigger, the likelier you whiff or flip nothing worth the mana. Here the incentive inverts. A deck built around the effect wants a stack of stackable mid-cost sorceries, each one now digging for another free spell underneath it, chaining value that a single high-cost cascade card could never generate. The 6/6 flying, trample body with its own cascade is almost the least interesting thing on the card: it announces the engine, then steps aside while your subsequent spells do the compounding. The granted ability draws a deliberate boundary, though: instants and sorceries only, and only from your hand, so you cannot loop it off recursion or graveyard casts, and permanents stay excluded. That fence preserves the card as a spellslinger reward rather than a general free-value machine. The whole thing reads as a study in taking a mechanic tuned for one expensive payoff and re-tuning it to reward volume instead.