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 - £3.40
Lightly Played - £2.90
Moderately Played - £2.40
Heavily Played - £1.70
Damaged - £1.10
Near Mint Non English - £3.40
Lightly Played Non English - £2.90
Moderately Played Non English - £2.40
Heavily Played Non English - £1.70
Damaged Non English - £1.10
Foil Prices
Near Mint Foil - £4.50
Lightly Played Foil - £3.80
Moderately Played Foil - £3.20
Heavily Played Foil - £2.30
Damaged Foil - £1.40
Near Mint Foil Non English - £4.50
Lightly Played Foil Non English - £3.80
Moderately Played Foil Non English - £3.20
Heavily Played Foil Non English - £2.30
Damaged Foil Non English - £1.40