Goyynoras, the Upweller

Devoid (This card has no color.)
When you cast Goyynoras, reveal a number of cards from the top of your library equal to the total number of cards in your graveyard, then cast all instant and sorcery spells revealed in this way. If a spell cast in this way would have one or more targets, those targets are chosen at random. Put all other cards revealed this way on the bottom of your library in a random order.