Combine Chrysalis

Give every token you make wings, then feed the leftovers into a 4/4 factory: this is a two-color artifact built for a board already full of small green-blue bodies. The flying rider is passive and free, converting a swarm of ground-bound Saprolings, Insects, and Elementals into an air force while your opponent's ground blockers stand useless. The activation is the grind: convert a spent Treasure, a stale Clue, or one surplus 1/1 into a green Beast, upgrading chaff into a genuine threat by the turn. Both halves feed on the same resource, so the wider you go, the harder both scale; a single card accelerates the beatdown and refills the long game. The sorcery-speed clamp is what holds the engine in check: each 4/4 costs a full main phase and four mana, so the Beast is a planned commitment rather than an ambush wedged into the opponent's combat. Green-blue rarely gets to be both the go-wide deck and the attrition deck at once, and this welds those impulses together into one enabler. Empty on its own, it presumes a board that manufactures bodies, then gives those bodies evasion and, eventually, a way to trade up.