Black Widow, Agile Avenger

Espionage as a punishment mechanic: the trigger fires not on the first card an opponent draws each turn (their natural draw step), but on the second, which means it does nothing to a durdling opponent and everything to one leaning on a card-advantage engine. That targeting is the clever part. The players most likely to feed it are exactly the ones who cast Rhystic Study, crack a fetch into a cantrip, or run a Howling Mine that suddenly cuts both ways. Each qualifying draw is a two-for-one in your favor: a counter that grows the 2/2 body toward relevance and a card that keeps your hand stocked, all off someone else's greed. Menace matters because a slow-scaling body needs to keep connecting to be worth anything, and once the draw engines across the pod are humming, the creature gets meaningfully larger without you spending a card. The whole thing functions as a soft governor on group-hug and draw-doubler strategies: it doesn't stop anyone from drawing, it taxes the pace, turning every extra card into a resource you siphon off. The ceiling depends entirely on how much the opposition wants to draw, which makes it a reactive threat rather than a proactive one: a creature that punishes greed but sits inert against opponents who respect it.