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 - $9.800
Lightly Played - $7.900
Moderately Played - $6.900
Heavily Played - $5.900
Damaged - $4.900
Near Mint Spanish - $9.800
Lightly Played Spanish - $7.900
Moderately Played Spanish - $6.900
Heavily Played Spanish - $5.900
Damaged Spanish - $4.900
Foil Prices
Near Mint Foil - $11.900
Lightly Played Foil - $9.500
Moderately Played Foil - $8.400
Heavily Played Foil - $7.200
Damaged Foil - $6.000
Near Mint Foil Spanish - $11.900
Lightly Played Foil Spanish - $9.500
Moderately Played Foil Spanish - $8.400
Heavily Played Foil Spanish - $7.200
Damaged Foil Spanish - $6.000