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 - $8.20
Near Mint Non-English - $8.20
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 - $4.10
Damaged Non-English - $4.10
Foil Prices
Near Mint Foil - $20.40
Near Mint Foil Non-English - $20.40
Lightly Played Foil - $18.40
Lightly Played Foil Non-English - $18.40
Played Foil - $14.30
Played Foil Non-English - $14.30
Heavily Played Foil - $12.30
Heavily Played Foil Non-English - $12.30
Damaged Foil - $10.20
Damaged Foil Non-English - $10.20