Karsumay, Madame des Tours

{x}{x}{w}{u}: Exile all face-down creatures you control and Karsumay, Madame des Tours face down. Place all cards exiled this way on top of your library in a random order. Than Manifest the top X cards of your library.
When Karsumay, Madame des Tours is turned face-up, if it is attacking and not blocked, exile each creature blocking a face-down creature you control and face-down creatures gain trample until the end of the turn.