Cheapest priced copy (Gatecrash): $0.35 at Card Kingdom, near mint, their price list as of .
Frenzied Tilling 
Sorcery · Common · Invasion · #247
Destroy target land. Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
2 printings · $0.35 to $3.49 at Card Kingdom
2 rulings from Wizards of the Coast
- 4 October 2004Because the “search” requires you to find a card with certain characteristics, you don’t have to find the card if you don’t want to.
- 24 January 2013If the target land is an illegal target when Frenzied Tilling tries to resolve, the spell won’t resolve and none of its effects will happen. You won’t search your library for a basic land card.