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 - $22.30
Near Mint Non-English - $22.30
Lightly Played - $20.00
Lightly Played Non-English - $20.00
Played - $15.60
Played Non-English - $15.60
Heavily Played - $13.40
Heavily Played Non-English - $13.40
Damaged - $11.20
Damaged Non-English - $11.20
Foil Prices
Near Mint Foil - $41.90
Near Mint Foil Non-English - $41.90
Lightly Played Foil - $37.70
Lightly Played Foil Non-English - $37.70
Played Foil - $29.40
Played Foil Non-English - $29.40
Heavily Played Foil - $25.20
Heavily Played Foil Non-English - $25.20
Damaged Foil - $21.00
Damaged Foil Non-English - $21.00