Orazca Puzzle-Door

Selection dressed as an artifact. The engine here is impulse-adjacent card filtering with a body count of zero: cast it for one blue, and later pay one more plus a tap to convert a topdeck into the better of two cards, binning the miss. What makes the packaging matter is the type line. Loot and dig effects usually live on instants, sorceries, or creatures, which means they read as blue spells or as enters-the-battlefield triggers you cannot recur cheaply. Stapling the effect to a one-mana artifact hands it to graveyard synergies (it fuels itself by sacrificing) and to any deck that counts noncreature permanents on the board. The cost structure is deliberately back-loaded: the deploy is cheap and passive, the payoff deferred until you have the second mana and a reason to fire it, so it sits as a threat of value rather than a tempo play. That the milled card goes to the graveyard rather than the bottom of the library is the tell about who this was built for. A dig that always feeds the yard is a dig for reanimator, flashback, and delve, not for the deck that just wants raw selection; the second card is not waste, it is fuel. The blue cost is the only real gate, and it keeps the card honest as a value piece rather than a colorless splash into any shell.