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.)
Near Mint - $8.30
Near Mint Non-English - $8.30
Lightly Played - $7.40
Lightly Played Non-English - $7.40
Played - $5.80
Played Non-English - $5.80
Heavily Played - $5.00
Heavily Played Non-English - $5.00
Damaged - $4.20
Damaged Non-English - $4.20
Foil Prices
Near Mint Foil - $22.00
Near Mint Foil Non-English - $22.00
Lightly Played Foil - $19.80
Lightly Played Foil Non-English - $19.80
Played Foil - $15.40
Played Foil Non-English - $15.40
Heavily Played Foil - $13.20
Heavily Played Foil Non-English - $13.20
Damaged Foil - $11.00
Damaged Foil Non-English - $11.00