Perception Bobblehead

The novelty tax is the whole equation here. A three-mana rock that taps for any color is fine on its own; the dig-and-cast ability is where the design gets clever, and where it gets deliberately clumsy. That effect scales with the number of Bobbleheads you control, which is the trick: you don't sink three more mana into looking one card deep, you build a small collection of these things until the top-of-library peek gets fat enough to reliably turn up a free three-drop. Note that the spell gets cast straight off the top, not stashed in hand, so the ability is an impulse-cast that commits you to running the thing right now rather than banking it. The floor is a scry-adjacent nothing when you have one; the ceiling is a genuine engine when you have four or five. The clamp that keeps it grounded is the mana-value-three-or-less limit on what qualifies, so the payoff is always a modest spell, never a bomb resolved a turn early. It's a card that only makes sense inside its own tribe, a self-referential archetype where the reward is proportional to how many copies of near-identical trinkets you're willing to run. That's an unusual thing to ask of a mana rock, and it puts Perception Bobblehead in the odd position of being a fixing artifact whose real payload only switches on once the rest of its family has arrived.