Tower of the Magi

{t}: Add {c} to your mana pool.
{6}, {t}, Exile an instant or sorcery card from your graveyard: Create a 1/1 colorless Magus creature token with "{x}, {t}, Exile this creature: You may cast a card exiled with Tower of the Magi without paying its mana cost. X is the converted mana cost of the exiled card."

History unearths itself for the worthy.