Breeding Pit (DDC) from Duel Decks: Divine vs. Demonic, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Adrian Smith
• Card Text:
  At the beginning of your upkeep, sacrifice Breeding Pit unless you pay BB.
  At the end of your turn, put a 0/1 black Thrull creature token into play.