Tamiyo's Logbook

Five generic and one blue for a single card is a nonstarter as printed, and that is exactly the point: the activation cost is designed to be paid down, not paid. Each other artifact you control shaves the price until it bottoms out at one blue mana plus the tap, at which point the Logbook becomes a repeatable draw engine that ticks along every turn. That scaling lands it squarely in artifact-density shells where both the mana and the tap are cheap by the time it hits the battlefield: the more you already have in play, the more it rewards the way you built. What holds it back is that it contributes nothing toward reaching that threshold itself. It is a payoff, not a builder, so it sits inert until the surrounding board is assembled: cast early, the three-mana artifact draws no cards for several turns and functions as a stone. Cast late, as the capstone on a wide artifact board, it is a low-friction way to convert artifact count into a steady stream of cards for just a blue and the tap. It asks the deck around it exactly one question (how many artifacts can you reliably keep on the battlefield?) and scales its answer straight to that number, a cleaner take on the payoff-scaling that artifact-synergy cards have chased since the mechanic first appeared.