Paperfin Rascal
Drop this Merfolk into play and you flip a coin weighted by your decklist: the entry trigger pits your highest hope against an opponent's, and only a costlier reveal earns the counter that turns a fragile 2/2 into something the size of a real threat. That makes the upside a referendum on curve. An aggressive list built cheap surrenders the bonus, while a deck that actually wants to win these contests has to carry pricier cards than its game plan would otherwise justify, a tension the keyword never quite resolved. The cleverer half is the consolation prize: win or lose, each player sends their revealed card to the top or the bottom, so a failed clash still lets you set up your next draw, and the opponent's reveal leaks information about theirs. That sculpting rider is why this whole family of creatures plays richer than its all-or-nothing surface suggests. Within the keyword's short catalog, this is the textbook version: arrive, contest once, grow on a win, with nothing fancier bolted on. Because the clash fires only when the creature enters, the minigame is a single resolved moment rather than an engine, which keeps designs like this as relics of a brief experiment in stapling a low-stakes top-of-library reveal onto creatures that would otherwise be replacement-level filler.
