Path of Mettle // Metzali, Tower of Triumph

The design premise is a keyword-matters test for a deck that doesn't cleanly exist. First strike, double strike, vigilance, and haste are scattered across colors and curves, and very few decks run two or more of them on purpose. The whole engine rests on that gap. The front face punishes a board of vanilla creatures with a one-damage sweep that conveniently spares exactly the creatures the flip condition wants, then asks you to swing with at least two of those keyword-bearing attackers to transform. Get there and the reverse becomes any-color fixing with two outlets: a repeatable red burn that hits each opponent, and a white ability that destroys a creature chosen at random from among those that attacked this turn. That white ability chooses rather than targets, so it slides past hexproof and shroud entirely; the randomness is the tax it pays for that reach, since you don't get to pick the exact threat. It's an instant-speed valve built to fire during or after combat, usually on an opponent's turn, against whoever swings back. The trouble is the bridge between the halves. The keyword collection the front demands rarely overlaps with a coherent two-mana-enchantment shell, so the front tends to sit as a marginal early sweeper that never flips, while the land you actually want lives behind an attack profile most decks aren't built to field. It's a transform card whose two faces want different decks, and the design never reconciles them: the reward on the reverse is genuinely good, but the price on the front is a commitment few payoffs justify.