Contagion Engine - SOM Reprint (PLST) from The List, 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. (Choose any number of permanents and/or players, then give each another counter of each kind already there. Then do it again.)