Leatherhead, Swamp Stalker This card will most likely show up in sideboards as another way to combat decks that dabble in artifacts/enchantments, but it deserves main deck consideration as well
10 double-sided tokens , 1 Helper card , 1 deck box , and 1 life tracker for smooth gameplay
Its rarity and historical significance make it highly valuable
Secret Rares in particular can be easily expected to fetch a higher price than other cards, with prices typically scaling in response to precisely how rare that particular card is
I love the balance here, since sacrificing artifacts for profit could easily suggest a deck that sits back and durdles, hiding behind a large handful of cards, but then, making a creature unblockable suggests a more aggressive stance with creatures that want to get in there with combat damage