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.)
![Contagion Engine [Scars of Mirrodin]](http://abyssgamestore.ca/cdn/shop/files/dce72636-08e4-484e-ad81-4d1597a31ffb_d687fb8b-10a9-4e00-aa7b-2daaa4a3fe5b.png?v=1761647609&width=1445)