Think Beyond Reality

Choose an instant or sorcery card in exile. That card gains recall until end of turn. Its recall cost
is equal to its mana cost.
Flashback {2}{u} (You may cast this card from your graveyard for its flashback cost. Then exile it.)
Recall {3}{u} (You may cast this card from exile for its recall cost. Then shuffle it into its owner's library.)
The power of mind has no limits.