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.
Near Mint - $1.60
Lightly Played - $1.30
Moderately Played - $1.10
Heavily Played - $1.00
Damaged - $0.80
Near Mint Spanish - $1.60
Lightly Played Spanish - $1.30
Moderately Played Spanish - $1.10
Heavily Played Spanish - $1.00
Damaged Spanish - $0.80