Trepanation Blade (ISD) from Innistrad, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Daniel Ljunggren
• Card Text:
  Whenever equipped creature attacks, defending player reveals cards from the top of his or her library until he or she reveals a land card. The creature gets +1/+0 until end of turn for each card revealed this way. That player puts the revealed cards into his or her graveyard.
  Equip 2