Instant - Trap, 3UU (5) If an opponent searched his or her library this turn, you may pay {0} rather than pay Archive Trap's mana cost. Target opponent puts the top thirteen cards of his or her library into his or her graveyard.
Illus. Jason Felix
10/1/2009: You may ignore a Trap's alternative cost condition and simply cast it for its normal mana cost. This is true even if its alternative cost condition has been met.
10/1/2009: Casting a Trap by paying its alternative cost doesn't change its mana cost or converted mana cost. The only difference is the cost you actually pay.
10/1/2009: Effects that increase or reduce the cost to cast a Trap will apply to whichever cost you chose to pay.
10/1/2009: Archive Trap checks only whether an opponent searched his or her library. It doesn't matter whether that player found a card during the search.
10/1/2009: A spell or ability causes a player to search his or her library only if it specifically contains the word "search" in its text. For example, if a spell or ability lets a player look at the top four cards of his or her library and do something with one of those cards, that's not a search.
10/1/2009: If a search effect is affected by Aven Mindcensor's ability (which causes a player to search the top four cards of his or her library instead), that still counts as searching that library.
10/1/2009: The opponent you target doesn't have to be the opponent who searched his or her library.
10/1/2009: If the targeted opponent has fewer than thirteen cards in his or her library, that player puts his or her entire library into his or her graveyard.
Zendikar
(Rare)