Cairn's Final Song is a quest in Tyranny.
- Travel to Halfgate/Plainsgate and meet with Misery, the Crimson Spear who is posted there. She is running all Chorus operations in the Stone Sea, and speak with her to learn how the effort to destroy Cairn is progressing.
- Misery asks you to head to Stone Down to meet with her second in command, Octave, who is in charge of finding Howling Rock. Octave will be of little help and ask you to negotiate with Hundred-Blood to gain passage to Howling Rock.
- Talk to Hundred-Blood to learn that she requests a favor: Eliminating the Earthshakers at Gulfglow Oldwalls.