Artifact — Bobblehead
Perception Bobblehead
{T}: Add one mana of any color. {3}, {T}: Look at the top X cards of your library, where X is the number of Bobbleheads you control. You may cast a spell with mana value 3 or less from among them without paying its mana cost. Put the rest on the bottom of your library in a random order.
From Magic: The Gathering.
Exact printings
Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6o6raw3yq7pb1h3nz2p1hc.