Each player chooses a color. Then exile each permanent unless it's colorless or it's only the color its controller chose.
UPC: MTG-M3C-035-F-BZSHI6GPCQ
UPC: MTG-M3C-035-F-BZSHI6GPCQ
UPC: MTG-M3C-035-F-BZSHI6GPCQ
UPC: MTG-M3C-035-F-BZSHI6GPCQ
UPC: MTG-M3C-035-F-BZSHI6GPCQ