When Contagion Clasp enters the battlefield, put a -1/-1 counter on target creature. {4}, {T}: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
Near Mint - $900
Lightly Played - $700
Moderately Played - $600
Heavily Played - $600
Damaged - $500
Near Mint Spanish - $900
Lightly Played Spanish - $700
Moderately Played Spanish - $600
Heavily Played Spanish - $600
Damaged Spanish - $500