Stirge

This is a Dungeons & Dragons monster built around one grim job (drain blood until the thing it landed on is dry), and the card names the mechanic and gives it a clean payload: turn a spent body into a card once it has done its work. The flying here is purely offensive; the can't-block clause means the evasion exists only to poke in for a point or trade in the air, never to hold a line. The Blood Drain activation asks for two mana and a life on top of the sacrifice, so cashing the Stirge in is never free tempo. That pricing is what keeps a one-mana flier that draws a card from reading as a value engine: the life payment and the mana tax mean you buy the replacement at a premium, usually after the 1/1 has stopped mattering. Structurally it is an evasive early attacker that later converts into a card, exactly the kind of low-stakes fodder a sacrifice-matters deck is happy to feed to an outlet before the ability ever fires. The design lineage runs through every creature that draws when it dies; the wrinkle here is that it draws by dying on your terms, at instant speed, for a cost you choose to pay, turning a used attacker into a resource you meter out rather than a trigger you wait on.