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 - £4.00
Lightly Played - £3.40
Moderately Played - £2.80
Heavily Played - £2.00
Damaged - £1.20
Near Mint Non English - £4.00
Lightly Played Non English - £3.40
Moderately Played Non English - £2.80
Heavily Played Non English - £2.00
Damaged Non English - £1.20
Foil Prices
Near Mint Foil - £23.60
Lightly Played Foil - £20.00
Moderately Played Foil - £16.50
Heavily Played Foil - £11.80
Damaged Foil - £7.10
Near Mint Foil Non English - £23.60
Lightly Played Foil Non English - £20.00
Moderately Played Foil Non English - £16.50
Heavily Played Foil Non English - £11.80
Damaged Foil Non English - £7.10