Parcel Myr

The type line is doing more work than the ability: this is a Myr and a Clue and a creature all at once, which means one two-mana body satisfies three different tribal and thematic hooks. The sacrifice-for-a-card ability is deliberately plain, a floor that ensures the card always has something to do, but the value sits in the overlap. Anything that cares about Myr sees a Myr; anything that cares about artifacts sees an artifact; anything that counts Clues (or wants to sacrifice one, or trigger off adjacent investigate effects) gets a body it can attack with first. That last point is the wrinkle worth naming. Unlike a Clue token, which sits inert until you crack it, this walks in as a 2/1 that can trade or chip damage, then cashes itself in for the same card the token would have drawn. The draw cost is baked into the creature rather than paid at investigate time, so the sequencing is yours: block first, or hold it as a mana sink you feed when there is nothing better to do. A modest engine wearing two overlapping subtypes ends up qualifying for more deckbuilding categories than most two-drops ever touch, which is exactly the return on stapling those subtypes together.