Amber Prison (6ED) from Classic Sixth Edition, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Donato Giancola
• Card Text:
  You may choose not to untap Amber Prison during your untap step.
  4, T: Tap target artifact, creature, or land. As long as Amber Prison is tapped, that permanent doesn’t untap during its controller’s untap step.