Arrigo Boito, and is the antagonist of an unfinished opera by Ferruccio Busoni.
This character places his fingers in his mouth and whistles violently towards the end of the aria "Son lo spirito che nega sempre." This character sarcastically advises to "not open the door" until the "ring is on your finger" in the serenade "Vous qui faites l'endormie." This character describes adulating the power of an object that is "victor over the gods" and "still standing" as he shatters a sword and sings an aria about the golden calf. He titles the best-known opera composed by (*) Arrigo Boito, and is the antagonist of an unfinished opera by Ferruccio Busoni. In his most famous operatic appearance, this character gifts a box of jewelry to a young woman, which prompts her to joyfully sing the Jewel Song. This character's evil scheme is foiled when a chorus of angels blasts open the walls of a prison and declares that Marguerite has been saved. For 10 points, name this character who beguiles the title protagonist of Charles Gounod's opera Faust.
This character places his fingers in his mouth and whistles violently towards the end of the aria "Son lo spirito che nega sempre.
Mephistopheles [or Mefistofele; or MÃ©phistophÃ©lÃ¨s; prompt on the devil] 