Contagion Engine
Contagion Engine {6}
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.)
Latest set: [SOM] Scars of Mirrodin ( R · #145 )