Sorcery, 2BB (4) Remove target nonblack creature from the game. Search its controller's graveyard, hand, and library for all cards with the same name as that creature and remove them from the game. That player then shuffles his or her library.1
Illus. Kev Walker
Does not remove other cards of the same name from play. Just from the graveyard, hand, and library. [D'Angelo 1999/06/01]
If you manage to turn a basic land (such as a Forest) into a creature, you can indeed use this effect on that basic land type. [D'Angelo 1999/06/01]
You do not have to find any of the cards in the player's library if you do not want to. See Rule G19.4. [D'Angelo 2001/07/14]
Use the name of the card as it leaves play. [Barclay 2002/10/07]
If a copy card, such as Clone, is targeted by this effect, you get to look for another copy of the card it is copying (not the Clone card). This is because a copy card actually takes on the name and initial characteristics of what it copies. [D'Angelo 2002/10/07]
A face down creature has no name, so you search for cards that also have no name. Since all cards in the graveyard, hand, and library have names, this is an unmeetable condition and the spell won't do anything other than remove the targeted creature from the game. [D'Angelo 2002/10/15]