VIDEOS:
Last Agni Kai
With both of their powers enhanced by the passing of Sozin's Comet, Zuko and Azula's violent sibling rivalry throughout the series culminates in an Agni Kai duel for the throne. The melancholic orchestra is a stark contrast to the fast and exotic music played during Zuko's Agni Kai with Zhao back in season 1.
Example of:
Sad Battle Music