As an additional cost to cast this spell, sacrifice an artifact. Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle.
NM-Mint - $4.00
Lightly Played - $3.60
Moderately Played - $3.20
Heavily Played - $2.80
Damaged - $2.00
NM-Mint Non English - $4.00
Lightly Played Non English - $3.60
Moderately Played Non English - $3.20
Heavily Played Non English - $2.80
Damaged Non English - $2.00
Foil Prices
NM-Mint Foil - $22.20
Lightly Played Foil - $20.00
Moderately Played Foil - $17.80
Heavily Played Foil - $15.60
Damaged Foil - $11.10
NM-Mint Foil Non English - $22.20
Lightly Played Foil Non English - $20.00
Moderately Played Foil Non English - $17.80
Heavily Played Foil Non English - $15.60
Damaged Foil Non English - $11.10