Mana Leech (USG) from Urza's Saga, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Mark A. Nelson
• Card Text:
  You may choose not to untap Mana Leech during your untap phase.
  T: Tap target land. As long as Mana Leech remains tapped, that land does not untap during its controller’s untap phase.