Gilt-Leaf Winnower
The kill clause carries an exception you have to read twice to parse: it wants a non-Elf creature whose power and toughness aren't equal. That single line of templating turns a value creature into a screening tool. A 3/3, a 2/2, a 5/5: all off-limits, because a square body simply does not satisfy the targeting requirement, so it can never be chosen. The 4/3 beater across the table, the 1/2 utility body, the attacker that just picked up a +1/+0 swing: all fair game. It is removal that punishes asymmetry, and the design consequence is that it interrogates the board at the moment it enters rather than offering a clean answer to whatever you point at. The destruction is a "may," so a board with nothing lopsided worth killing costs you nothing, and you are never forced to actually destroy a target you dislike; you either fire at a legal uneven creature or, on resolution, decline. The Elf carve-out is doing flavor work (a noble assassin sparing its own kind) more than mechanical protection. Menace on a 4/3 body means the card keeps working after the trigger resolves: a hard-to-block clock, not a spent removal spell stapled to a fragile chump. The whole package rewards reading the texture of a board, whose creatures are balanced and whose aren't, in a way that ordinary destroy-target-creature effects never ask of you.
