Buttercup, Provincial Princess gets +1/+1 for each color among other legendary permanents you control.
WUBRG: Search your library for a legendary permanent card with mana value less than Buttercup's power, put that card onto the battlefield, then shuffle.
Near Mint - $30.00
Lightly Played - $28.50
Moderately Played - $24.00
Heavily Played - $18.00
Damaged - $15.00
Near Mint Non-English - $30.00
Lightly Played Non-English - $28.50
Moderately Played Non-English - $24.00
Heavily Played Non-English - $18.00
Damaged Non-English - $15.00
Foil Prices
Near Mint Foil - $36.00
Lightly Played Foil - $34.25
Moderately Played Foil - $28.75
Heavily Played Foil - $21.75
Damaged Foil - $18.00
Near Mint Foil Non-English - $36.00
Lightly Played Foil Non-English - $34.25
Moderately Played Foil Non-English - $28.75
Heavily Played Foil Non-English - $21.75
Damaged Foil Non-English - $18.00