This infobox is incomplete, please help the wiki by filling it in.
Divinity 2 Murder for Myrthos Hermosa

Hermosa offers her thanks at the end of the quest

Murder for Myrthos is a quest assigned by Hermosa at your Battle Tower if she was chosen as your skill trainer. This quest is received after completing Dear John.

She wants you to slaughter her sister Kali, a General in the Black Ring who killed their own father, and retrieve Myrthos, a powerful one-handed sword that he forged. Travel to Kali's Flying Fortress in the Orobas Fjords using your dragon form, and confront her in the fortress' headquarters on the southern-most platform.

After killing her and obtaining the sword, return to Hermosa at the Battle Tower.