The Songline is a quest in Might & Magic: Heroes Online.
The hero, after rescuing Thomon, has to find a Dragon Knight, who protects a sacred relic called the Songline. The protector of the Songline lies up the stairs, fighting some ember treants. After defeating the demons, Thomon visits the protector, who is dying. Her last words are that a succubus stole the Songline. Thomon knows the protector did her best to protect the Songline, as she passes away.