Ugin's Dreamcatcher

{4},{t}: Exile a card from your hand or graveyard. Search your library for a card that shares a card type with it, reveal that card,
then shuffle your library and put that card on top of it.
"For eons, I have sought to discover the secrets of
the Blind Eternities. Now, I fear, I have witnessed its true grandeur; and peril." - Ugin