Götterdämmerung

noun2

1. •
   The myth of the destruction of the gods in a final battle with the forces of evil; Ragnarök.
2. •
   Any cataclysmic downfall or momentous, apocalyptic event, especially of a regime or an institution.

   • After so much music, love, and flowers, she felt benumbed, thunder-struck by this psychedelic Götterdämmerung. — 2004