Vilespawn Spider

Every creature you have milled, discarded, or seen die is a soldier waiting to be drafted, and the spider's job is to count them and cash out. The upkeep mill is not card advantage in the usual sense; it is fuel, a self-inflicted trickle that stocks the yard with the raw material the sacrifice ability wants. That ability is the payoff: convert the spider's whole life into a swarm of Insect tokens, one per creature card in the graveyard, so the board you have spent several turns burying comes back all at once. The sorcery-speed clause and the tap-and-sacrifice cost keep it from being a combat trick or a surprise blocker: this is a turn you plan around, on a graveyard you have deliberately grown. The reach on a 2/3 frame is the patient part, a flyer-blocker that survives while the count climbs. What keeps the design honest is that the mill cuts both ways. It advances the sacrifice clock, but it also eats into your library, so a stalled game where you never get to activate turns the ability into a slow bleed rather than a resource. Green-blue rarely gets a self-mill engine this cleanly tied to a token finisher; most self-mill wants the graveyard for recursion or delve, not for a physical army. Here the graveyard is the army, and the spider is the recruiter.