Goblin Engineer

A tutor and a reanimator engine stapled to a two-mana body, which is a strange amount of function to ask of a 1/2. The enters-the-battlefield search does not put the artifact into play or your hand; it goes straight to the graveyard, which reads like a downside until you realize it is the whole point. The card is a two-part machine: the first half fills the yard with exactly the artifact you want, the second half pulls it back out for a red mana and a sacrifice. The mana value 3 or less clause on the reanimation is the fence that keeps this from cheating out anything expensive; it wants a bin full of cheap, high-impact artifacts rather than a single bomb. That fence also defines the archetype it serves, since the strongest lines involve fetching one artifact, sacrificing a different one to return it, and generating a loop or a payoff in the seam. Because the activated ability costs a sacrifice, the artifact you tutor up and the artifact you feed the ability are often two different cards, which turns the whole package into a combo assembly kit rather than a value grinder. Bodies this small usually do this little; this one is a self-contained toolbox that rewards knowing exactly which two artifacts you need and in what order.