Narsha, Space and Time

When you cast Narsha, search your library for a
card that's exactly five colors and put it onto the battlefield, then shuffle your library. You may
only cast Narsha if you control a creature, a land,
an enchantment, an artifact, and a planeswalker.
Flying, Shroud
{w}{u}{b}{r}{g}, {t}: Destroy all creatures that are 4
or fewer colors.