Seer's Lantern

A colorless mana rock with a built-in card-selection valve, which is a more deliberate piece of design than the rate suggests. Most three-mana rocks justify themselves on ramp alone; this one stays relevant long after the acceleration stops mattering by converting flooded turns into scry activations. The tradeoff is the cost of that second ability: two mana plus the tap means you cannot ramp and dig in the same turn, so the rock asks you to decide each turn whether you need the colorless or the look at the top of your library. That split keeps it from going dead, since a board that no longer needs ramp still has a use for the artifact instead of a draw it cannot deploy. Then there is the shape of the output: it accelerates anything but fixes nothing, which pushes it toward decks built on generic costs and big artifacts rather than tight color requirements. Humble work, earning its slot by never being a blank in the late game rather than by accelerating you into something explosive early.