Employee, Company's Asset

You can't cast permanent spells

{4}, {t}: Add {w}{u}{b}{r}{g}. When you cast your
next spell this 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 it's mana cost. Put each other card
exiled this way on the bottom of your library
in a random ordered.