Sisay, Weatherlight Captain gets +1/+1 for each color among other legendary permanents you control.
WUBRG: Search your library for a legendary permanent card with converted mana cost less than Sisay's power, put that card onto the battlefield, then shuffle your library.
Near Mint - $1.200
Lightly Played - $1.000
Moderately Played - $900
Heavily Played - $800
Damaged - $600
Near Mint Spanish - $1.200
Lightly Played Spanish - $1.000
Moderately Played Spanish - $900
Heavily Played Spanish - $800
Damaged Spanish - $600