Justin's Grand Design

Exile all creatures and planeswalkers. Put an interplanar counter on each of them.
Whenever you look at Justin's Grand Design from your library, you may reveal it. If you do, exile a non-land permanent with an interplanar counter on it. Shuffle your library.
Spells with the same name as a card in exile with an interplanar counter on it can't be cast.
"My magnum opus is complete... I think."
-Justin