Combat Courier

A cantrip disguised as a body. The , sacrifice line is the whole point: this draws a card and happens to spend a turn sitting on the battlefield as a 1/1 first. The draw is banked rather than immediate, so the artifact does real work between casting and cashing out. It blocks, it pads the artifact count that certain engines tally, and it feeds a graveyard, all before you pay to convert it into a card. Then unearth changes the accounting entirely. A single blue mana returns it from the graveyard with haste, granting a second sacrifice activation (and a second card) off one physical object, at the cost of exiling it afterward. That blue unearth clause is the wrinkle that pulls a colorless artifact into a specific gear: any deck able to produce blue gets two draws and two artifact-leaves-the-battlefield events from one cheap creature, split across two turns. That is a lot of accrued value stapled to a construct whose combat stats are almost incidental. The design lives at the intersection of cantrip, sacrifice fodder, and recursion, which is why it slots into engines that count artifacts entering, dying, or leaving far more naturally than its plain 1/1 frame suggests.