Mindeye Drake

The body tells you everything about how this drake wants to be used. A 2/5 flier blocks all day and trades into nothing it cares about, because the mill happens after it leaves the battlefield rather than while it sits there. That death trigger inverts the usual logic of a defensive flier: most walls want to survive, while this one wants to be killed, since dying is when it does its job. Milling five cards off the top of a target player's library is a single discrete chunk, not an engine, so it sits in the awkward middle of mill design: too small to be a clock on its own, too contingent to combo cleanly, and reliant on an opponent obliging by removing it or a controller obliging by feeding it to a sacrifice outlet. The flexibility of "target player" is the quiet redeeming wrinkle, letting it fill your own graveyard rather than only attacking an opponent's deck, but the rate never asks to be built around. What you have is a stalling body with a mill rider stapled to its death: a common-rarity piece for a self-mill or library-attrition deck that wants bodies in the air and incidental cards in the bin, and not much beyond that.