|"Mystical Teachings", |"Snapcaster Mage", "Modern Masters 2017 Edition" (2)
Search your library for an instant card or a card with flash, reveal it, put it into your hand, then shuffle.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)
Flash
When Snapcaster Mage enters, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)
Gatherer works better in the Companion app!
(You may cast this card from your graveyard for its flashback cost. Then exile it.)