Forbidden Knowledge

Choose one:
•Exile the top two cards of target player's library,
you may play those cards from exile as if they
required mana of any color.
•Shuffle 3 cards from a player's graveyard into
their library.
•Add 3 mana of any color to your mana pool.
Flashback {u/b}{u}{b}
As the archangel of knowledge, he holds many secrets
his god would not like others to know.