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 - $6.20
Lightly Played - $5.60
Moderately Played - $5.00
Heavily Played - $4.40
Damaged - $3.10
NM-Mint Non English - $6.20
Lightly Played Non English - $5.60
Moderately Played Non English - $5.00
Heavily Played Non English - $4.40
Damaged Non English - $3.10