Which of these has the most acts, Die Walküre or Intermezzo?
Die Walküre: Die Walküre (The Valkyrie), WWV 86B, is a music drama in three acts by Richard Wagner with a German libretto by the composer. Intermezzo (opera):  72, is an opera in two acts by Richard Strauss to his own German libretto, described as a "Bürgerliche Komödie mit sinfonischen Zwischenspielen " (bourgeois comedy with symphonic interludes).
Die Walküre