Scour the Starscape

Dream 3. (Exile the top three cards of your library as
part of your imagination, then put a card from your imagination into your hand.)
You may cast Scour the Starscape from your graveyard
as long as there are five or more cards in your
imagination. If you cast it this way and it would
be put into your graveyard, exile it instead.
"As the goddess Elysia gazed up at the sky, the dance
of the cosmos painted pictures in the stars."