Codie, Vociferous Codex

You can't cast permanent spells.
{4} {t}: Add {w}{u}{b}{r}{g}. When you next cast
a spell this turn, exile cards from the top of your library until you exile an instant or sorcery
card with lesser mana value. Until end of
turn, you may cast that card without paying
its mana cost. Put each other card exiled this
way on the bottom of your library in a
random order.