Mischievous Quanar

Most morphs pay off with a single trigger when they flip: a bounce, a counter, a few points of damage. This one flips for a Fork. Turning it face up copies an instant or sorcery already on the stack, with the freedom to redirect that copy wherever you like, which means the whole engine lives in the timing window between casting your spell and letting it resolve. Doing it twice asks for a real investment, though: the ability that turns it back face down is the reset, so each loop of cast-spell, flip-to-copy, re-hide costs five mana to go face down again plus the morph cost on the way back up, eight mana per copy beyond the first. That recursion is the design tension. A one-shot Fork stapled to a 3/3 body is fair; a repeatable spell-doubler that survives combat is not, so the price of re-hiding is steep enough to keep it from running away inside a single turn while still leaving the loop open across several. The face-down body also conceals the threat: an opponent looking at a 2/2 for has no way to know whether the morph cost they're about to walk into doubles a removal spell, a burn spell, or a game-ender. It reads as a spellslinger curiosity, and it is, but the underlying idea (morph as a way to ambush the stack rather than the board) is sharper than the rate suggests.