Contagion Engine (SOM) from Scars of Mirrodin, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Daarken
• Card Text:
  When Contagion Engine enters the battlefield, put a -1/-1 counter on each creature target player controls.
  4, T: Proliferate, then proliferate again. (You choose any number of permanents and/or players with counters on them, then give each another counter of a kind already there. Then do it again.)