Sorcery
Return up to one target artifact or enchantment card from your graveyard to the battlefield. Exile the top two cards of your library. Until the end of your next turn, you may play those cards.
You don't have to choose a target artifact or enchantment card to cast Campus Renovation. However, if you do, and that card is an illegal target at the time Campus Renovation tries to resolve, it won't resolve and none of its effects will happen. You won't exile any cards from your library.