If an opponent would mill one or more cards, they mill twice that many cards instead. (To mill a card, a player puts the top card of their library into their graveyard.)
NM-Mint - $38.80
Lightly Played - $35.00
Moderately Played - $31.10
Heavily Played - $27.20
Damaged - $19.40
NM-Mint Non English - $38.80
Lightly Played Non English - $35.00
Moderately Played Non English - $31.10
Heavily Played Non English - $27.20
Damaged Non English - $19.40