Urza's Tower (C) (CHR) from Chronicles, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Mark Poole
• Card Text:
  T: Add one colorless mana to your mana pool. If you control Urza’s Mine, Urza’s Tower, and Urza’s Power Plant, add three colorless mana to your mana pool instead of one.