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 - $6.90
Near Mint Non-English - $6.90
Lightly Played - $6.20
Lightly Played Non-English - $6.20
Played - $4.90
Played Non-English - $4.90
Heavily Played - $4.20
Heavily Played Non-English - $4.20
Damaged - $3.50
Damaged Non-English - $3.50
Foil Prices
Near Mint Foil - $47.10
Near Mint Foil Non-English - $47.10
Lightly Played Foil - $42.40
Lightly Played Foil Non-English - $42.40
Played Foil - $33.00
Played Foil Non-English - $33.00
Heavily Played Foil - $28.30
Heavily Played Foil Non-English - $28.30
Damaged Foil - $23.60
Damaged Foil Non-English - $23.60