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 - $45.10
Lightly Played - $42.90
Moderately Played - $40.60
Heavily Played - $36.10
Damaged - $29.30
NM-Mint Non English - $45.10
Lightly Played Non English - $42.90
Moderately Played Non English - $40.60
Heavily Played Non English - $36.10
Damaged Non English - $29.30