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 - $6.70
Lightly Played - $5.40
Moderately Played - $4.70
Heavily Played - $4.00
Damaged - $3.40
Near Mint Spanish - $6.70
Lightly Played Spanish - $5.40
Moderately Played Spanish - $4.70
Heavily Played Spanish - $4.00
Damaged Spanish - $3.40
Foil Prices
Near Mint Foil - $21.30
Lightly Played Foil - $17.10
Moderately Played Foil - $15.00
Heavily Played Foil - $12.80
Damaged Foil - $10.70
Near Mint Foil Spanish - $21.30
Lightly Played Foil Spanish - $17.10
Moderately Played Foil Spanish - $15.00
Heavily Played Foil Spanish - $12.80
Damaged Foil Spanish - $10.70