Text (UD): {3},{Tap}: Choose a number greater than 0 and a color. Target opponent reveals his or her hand. If that opponent reveals exactly the chosen number of cards of the chosen color, you draw a card.
The only valid colors are black, blue, green, red, and white. See Rule 105.4. [D'Angelo 1999/06/01]
You choose a target opponent on announcement. You choose a number and color during resolution, then the opponent reveals their hand. [D'Angelo 1999/10/18]
