Lobotomy
Sorcery
Target player reveals their 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 exile them. Then that player shuffles.
Thomas M. Baxa
Rulings
The copies must be found if they are in publicly viewable zones. Finding copies while searching private zones is optional.
(wotc • 2005-02-01)
It exiles the chosen card plus all others in the hand, library, and graveyard. Some people thought the chosen card was not exiled due to some vague wording.
(wotc • 2004-10-04)
If the player has no cards in their hand, you still get to look through their deck, but you do not get to exile any cards.
(wotc • 2004-10-04)
You only get to pick one card from the player’s hand.
(wotc • 2004-10-04)
Does not affect cards on the battlefield.
(wotc • 2004-10-04)
Rulings
The copies must be found if they are in publicly viewable zones. Finding copies while searching private zones is optional.
(wotc • 2005-02-01)
It exiles the chosen card plus all others in the hand, library, and graveyard. Some people thought the chosen card was not exiled due to some vague wording.
(wotc • 2004-10-04)
If the player has no cards in their hand, you still get to look through their deck, but you do not get to exile any cards.
(wotc • 2004-10-04)
You only get to pick one card from the player’s hand.
(wotc • 2004-10-04)
Does not affect cards on the battlefield.
(wotc • 2004-10-04)