Numbing Dose (NPH) from New Phyrexia, available at 401 Games Canada.

• Rarity: Common
• Finish: Normal
• Artist: Brad Rigney
• Card Text:
  Enchant artifact or creature
  Enchanted permanent doesn't untap during its controllers' untap step.
  At the beginning of the upkeep of enchanted permanent's controller, that player loses 1 life.