The Swarmweaver

Three bodies for one card is the opening pitch (a 2/3 Scarecrow plus two 1/1 flyers), but the real trick is that this creature scales its own progeny. The enters trigger seeds a board of small flyers, and delirium then converts those tokens (plus any other Insects or Spiders around) from chump-blocker chaff into deathtouch beaters that trade up against anything. That coupling is the interesting part: a token generator that also grows what it makes, so a single cast answers two of a swarm deck's structural problems at once (going wide and finding a payoff). The graveyard condition is the tax on that value. A creature-heavy deck does not stumble into four types among its dead cards, so until the count fills the board is just a 2/3 and two 1/1s: fine, not frightening. Scarecrows have long been color-agnostic artifact filler, which makes a legendary one that anchors a payoff rather than filling a curve a genuine departure for the type. The Insect-and-Spider rider quietly widens the aristocrats and go-wide toolbox that black-green has leaned on for years, handing those tokens a stat bump and evasion-relevant deathtouch in one static ability. Best of all, it asks for a graveyard you were already trying to fill: the delirium requirement and the deck's natural gameplan point the same direction, which is the cleanest kind of payoff a black-green board can hope for.