In Scene 10, Faustus is at the court of Carolus the Fifth, and the Emperor challenges Faustus to express his magic and raise Alexander the Great from the Dead
In Scene 10, Faustus explains that he cannot raise their physical bodies which have turned to dust, but says he can make Alexander the Great's spirit appear
In Scene 10, a Knight keeps interjecting scepticism about Faustus's abilities, this is when Mephastophilis ushers Alexander the Great and his paramour (who appears to be alive and tangible)
In Scene 10, after Alexander the Great is seen by the Emperor, the snide Knight walks back in with horns on his head due to Faustus' powers and the Emperor points them out and how the man's wife cheated on him
In Scene 10, after Faustus puts horns on the Knight's head, the furious knight demands Faustus undo this magic & after savouring his revenge, Faustus does so and leaves the court