Ramos, Master of Spheres

+2: Search your library for a card with at least one color permanents you control aren't. Put it into your hand, then shuffle your library.
0: Put a card from your sideboard into your hand. It costs one less mana of a color among permanents you control of your choice to cast.
-7: For each color among permanents you control, search your library for a card of that color and put it onto the battlefield.