Search your library for a creature card with mana value X or less, put it onto the battlefield, then shuffle. Harmonize {X}{G}{G}{G}{G} (You may cast this card from your graveyard for its harmonize cost. You may tap a creature you control to reduce that cost by an amount of generic mana equal to its power. Then exile this spell.)
Near Mint - $2.75
Lightly Played - $2.50
Moderately Played - $2.25
Heavily Played - $1.75
Damaged - $1.50
Near Mint Non-English - $2.75
Lightly Played Non-English - $2.50
Moderately Played Non-English - $2.25
Heavily Played Non-English - $1.75
Damaged Non-English - $1.50
Foil Prices
Near Mint Foil - $7.75
Lightly Played Foil - $7.25
Moderately Played Foil - $6.25
Heavily Played Foil - $4.75
Damaged Foil - $4.00
Near Mint Foil Non-English - $7.75
Lightly Played Foil Non-English - $7.25
Moderately Played Foil Non-English - $6.25
Heavily Played Foil Non-English - $4.75
Damaged Foil Non-English - $4.00