Spectral Gateguards (DDQ) from Duel Decks: Blessed vs. Cursed, available at 401 Games Canada.

• Rarity: Common
• Finish: Normal
• Artist: Wayne England
• Card Text:
  Soulbond (You may pair this creature with another unpaired creature when either enters the battlefield. They remain paired for as long as you control both of them.)
  As long as Spectral Gateguards is paired with another creature, both creatures have vigilance.