Booby Trap

Artifact    (CMC:6)

When Booby Trap comes into play, name a card other than a basic land. Whenever target opponent draws any cards, he or she reveals those cards to all players. If any of those cards is the named card, Sacrifice Booby Trap and it deals 10 damage to that player.

TE • ENDoug Chaffee

™ & © 1993—1997 Wizards of the Coast

Legal in: Modern,Tempest Block,Legacy,Vintage,Freeform,Prismatic,Tribal Wars Legacy,Singleton 100,Commander

Oracle Text (click to copy):

Booby Trap {6} Artifact As Booby Trap enters the battlefield, name a card other than a basic land card and choose an opponent. The chosen player reveals each card he or she draws. When the chosen player draws the named card, sacrifice Booby Trap. If you do, Booby Trap deals 10 damage to that player.

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View this MTG card on Gatherer

10/4/2004
The "if you do" part is only done if you successfully sacrifice this card. In other words, it has to be on the battlefield when the trigger resolves or it does not deal damage.
8/1/2005
The choice of which card to name is part of the resolution of the spell or ability which puts Booby Trap onto the battlefield.  It can't be countered.
8/1/2005
If an effect causes the player to draw multiple cards, each card is revealed as it's drawn. If Booby Trap's ability triggers, it will go on the stack once the card-drawing effect has concluded.
8/1/2005
If a single Booby Trap's ability triggers multiple times, then only the first ability to resolve causes Booby Trap to be sacrificed and damage to be dealt.
8/1/2005
If Booby Trap's last ability is countered, Booby Trap remains on the battlefield (and no damage is dealt).

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Card Booby Trap is not on TCGPlayer.