Galatea, Aspect of Destiny

When you cast Galatea, Aspect of Destiny,
search any number of target opponent's
libraries for 9 nonland cards and exile them face
down. You may cast those cards for as long as
they remain in exile and you may spend mana as
though it were many of any color to cast them.
At the beginning of each end step, if there are
no cards exiled by Galatea, you win the game.