Spry and Mighty

The math is the whole engine, and it inverts the usual green logic. Green rewards you for going wide and going big; this card rewards you for building a gap. X scales off the difference between two creatures' powers, so the payoff is largest when you pair your fattest threat with something tiny: a 7/7 next to a 1/1 draws six cards and pumps both by six, dragging the runt up to a 7/7 with trample while your big creature swings as a 13/13 until end of turn. Pair two evenly matched bodies and you get nothing but a whiff, no cards drawn and no stat boost, which is the constraint that stops it from being a flat draw-plus-anthem spell. That single subtraction reframes the deckbuilding question: you no longer want a curve that smooths out, you want a lopsided board, one enormous power outlier and a cheap body to measure against it. It folds card advantage and a lethal alpha-strike enabler into one sorcery, but only for a board built to feed it. The trample on both chosen creatures is what converts the arithmetic into damage rather than just a bigger blocker; the temporary +X/+X on the smaller creature is often incidental, a side effect of a symmetric buff that green would rather point at the one that can actually connect. It is a combat spell disguised as a draw spell, priced so the difference has to already exist before you cast it.