Liar's Pendulum

Oracle Text

2, T: Choose a card name. Target opponent guesses whether a card with that name is in your hand. You may reveal your hand. If you do and your opponent guessed wrong, draw a card.

Card Rulings

12/1/2004 First you name a card. Then the targeted opponent guesses whether the card is in your hand.
12/1/2004 After the opponent has guessed, you may reveal your hand. If your opponent was wrong, you draw a card. If your opponent was right, you don’t draw a card.
12/1/2004 You reveal your hand only if you choose to, regardless of whether your opponent guessed right or wrong.
12/1/2004 You can’t draw a card if you don’t reveal your hand.