Keldon Megaliths (FUT) from Future Sight, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Philip Straub
• Card Text:
  Keldon Megaliths comes into play tapped.
  T: Add R to your mana pool.
  Hellbent — 1R, T: Keldon Megaliths deals 1 damage to target creature or player. Play this ability only if you have no cards in hand.