Sorcery, 2UB (4) Target player reveals his or her hand, then you choose a card other than a basic land card from it. Search that player's graveyard, hand, and library for all cards with the same name as the chosen card and remove them from the game. Then that player shuffles his or her library.1
Illus. Thomas M. Baxa
You only get to pick one card from the player's hand. [D'Angelo 1997/11/03]
If the player has no cards in their hand, you still get to look through their deck, but you do not get to remove any cards. [D'Angelo 1998/01/27]
It removes the chosen card plus all others in the hand, library, and graveyard. [D'Angelo 1998/02/25] Some people thought the chosen card was not removed due to some vague wording.
Does not affect cards in play. [Invasion FAQ 2000/10/03]
You have the choice to not find copies of the card in their library (see Rule G19.4). You would almost certainly want to find them all, however. [D'Angelo 2001/06/15]