The Master and Margarita
Mikhail Bulgakov
the city that decided the devil does not exist, Berlioz's wager in chapter 1 and the investigation in the Epilogue.
Macbeth
William Shakespeare
the witches in scene 1 of Act I, Banquo's ghost in scene 4 of Act III, Hecate in scene 5 of Act III, and the moving wood in scene 5 of Act V.