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 - $9.70
Lightly Played - $7.80
Moderately Played - $6.80
Heavily Played - $5.90
Damaged - $4.90
Near Mint Spanish - $9.70
Lightly Played Spanish - $7.80
Moderately Played Spanish - $6.80
Heavily Played Spanish - $5.90
Damaged Spanish - $4.90
Foil Prices
Near Mint Foil - $12.30
Lightly Played Foil - $9.90
Moderately Played Foil - $8.60
Heavily Played Foil - $7.40
Damaged Foil - $6.20
Near Mint Foil Spanish - $12.30
Lightly Played Foil Spanish - $9.90
Moderately Played Foil Spanish - $8.60
Heavily Played Foil Spanish - $7.40
Damaged Foil Spanish - $6.20