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 - $10.70
Lightly Played - $8.60
Moderately Played - $7.50
Heavily Played - $6.40
Damaged - $5.40
Near Mint Spanish - $10.70
Lightly Played Spanish - $8.60
Moderately Played Spanish - $7.50
Heavily Played Spanish - $6.40
Damaged Spanish - $5.40
Foil Prices
Near Mint Foil - $24.30
Lightly Played Foil - $19.40
Moderately Played Foil - $17.00
Heavily Played Foil - $14.60
Damaged Foil - $12.20
Near Mint Foil Spanish - $24.30
Lightly Played Foil Spanish - $19.40
Moderately Played Foil Spanish - $17.00
Heavily Played Foil Spanish - $14.60
Damaged Foil Spanish - $12.20