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 - $3.10
Lightly Played - $2.80
Moderately Played - $2.50
Heavily Played - $2.20
Damaged - $1.60
NM-Mint Non English - $3.10
Lightly Played Non English - $2.80
Moderately Played Non English - $2.50
Heavily Played Non English - $2.20
Damaged Non English - $1.60
Foil Prices
NM-Mint Foil - $21.90
Lightly Played Foil - $19.80
Moderately Played Foil - $17.60
Heavily Played Foil - $15.40
Damaged Foil - $11.00
NM-Mint Foil Non English - $21.90
Lightly Played Foil Non English - $19.80
Moderately Played Foil Non English - $17.60
Heavily Played Foil Non English - $15.40
Damaged Foil Non English - $11.00