Cogito, the Icy Flame

Cogito, the Icy Flame gets +1/+1 for each color
among other legendary permanents you control.
{w}{u}{b}{r}{g}: Search your library for a legendary permanent card with converted mana cost less than Cogito's power, put that card onto the battlefield, then shuffle your library.

"And the void is the virtue that won't forget, or half-ass, or look away; that fuels its life with its real fire, and so channels living energy."