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 - $10.700
Lightly Played - $8.600
Moderately Played - $7.500
Heavily Played - $6.500
Damaged - $5.400
Near Mint Spanish - $10.700
Lightly Played Spanish - $8.600
Moderately Played Spanish - $7.500
Heavily Played Spanish - $6.500
Damaged Spanish - $5.400
Foil Prices
Near Mint Foil - $11.800
Lightly Played Foil - $9.400
Moderately Played Foil - $8.300
Heavily Played Foil - $7.100
Damaged Foil - $5.900
Near Mint Foil Spanish - $11.800
Lightly Played Foil Spanish - $9.400
Moderately Played Foil Spanish - $8.300
Heavily Played Foil Spanish - $7.100
Damaged Foil Spanish - $5.900