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.)
Near Mint - $13.40
Lightly Played - $10.70
Moderately Played - $9.40
Heavily Played - $8.10
Damaged - $6.70
Near Mint Spanish - $13.40
Lightly Played Spanish - $10.70
Moderately Played Spanish - $9.40
Heavily Played Spanish - $8.10
Damaged Spanish - $6.70
Foil Prices
Near Mint Foil - $20.80
Lightly Played Foil - $16.70
Moderately Played Foil - $14.60
Heavily Played Foil - $12.50
Damaged Foil - $10.40
Near Mint Foil Spanish - $20.80
Lightly Played Foil Spanish - $16.70
Moderately Played Foil Spanish - $14.60
Heavily Played Foil Spanish - $12.50
Damaged Foil Spanish - $10.40