Forgotten Cave (DDJ) from Duel Decks: Izzet vs. Golgari, available at 401 Games Canada.

• Rarity: Common
• Finish: Normal
• Artist: Tony Szczudlo
• Card Text:
  Forgotten Cave enters the battlefield tapped.
  T: Add R to your mana pool.
  Cycling R (R, Discard this card: Draw a card.)