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 - £14.80
Lightly Played - £12.60
Moderately Played - £10.40
Heavily Played - £7.40
Damaged - £4.50
Near Mint Non English - £14.80
Lightly Played Non English - £12.60
Moderately Played Non English - £10.40
Heavily Played Non English - £7.40
Damaged Non English - £4.50
Foil Prices
Near Mint Foil - £31.30
Lightly Played Foil - £26.60
Moderately Played Foil - £21.90
Heavily Played Foil - £15.70
Damaged Foil - £9.40
Near Mint Foil Non English - £31.30
Lightly Played Foil Non English - £26.60
Moderately Played Foil Non English - £21.90
Heavily Played Foil Non English - £15.70
Damaged Foil Non English - £9.40