Basalt Monolith (2ED) from Unlimited Edition, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Jesper Myrfors
• Card Text:
  Tap to add 3 colorless mana to your mana pool. Does not untap as normal during untap phase; spend 3 to untap. Tapping this artifact can be played as an interrupt.