Cheapest priced copy (Breaking News): $1.49 at Card Kingdom, near mint, their price list as of .
Archive Trap 
Instant — Trap · Rare · Zendikar · #41
If an opponent searched their library this turn, you may pay {0} rather than pay this spell's mana cost.
Target opponent mills thirteen cards.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
3 printings · $1.49 to $24.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Breaking News | 7 | Rare | $1.49 | $3.49 |
| The List | ZEN-41 | Rare | $3.99 | — |
| Zendikar | 41 | Rare | $2.79 | $24.99 |
8 rulings from Wizards of the Coast
- 1 October 2009A spell or ability causes a player to search their 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 their library and do something with one of those cards, that’s not a search.
- 1 October 2009Archive Trap checks only whether an opponent searched their library. It doesn’t matter whether that player found a card during the search.
- 1 October 2009You 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.
- 1 October 2009Casting a Trap by paying its alternative cost doesn’t change its mana cost or mana value. The only difference is the cost you actually pay.
- 1 October 2009Effects that increase or reduce the cost to cast a Trap will apply to whichever cost you chose to pay.
- 1 October 2009If the targeted opponent has fewer than thirteen cards in their library, that player puts their entire library into their graveyard.
- 1 October 2009If a search effect is affected by Aven Mindcensor’s ability (which causes a player to search the top four cards of their library instead), that still counts as searching that library.
- 1 October 2009The opponent you target doesn’t have to be the opponent who searched their library.