Songs of the Dark Lantern.
Wirt and Greg visit a tavern to ask for directions to Adelaide's house. The tavern people warn the brothers about the Beast and reveal that the creature turns people into trees of oil to burn in his lantern. Wirt steals a talking horse named Fred and finds Beatrice unconscious next to the Woodsman, and Wirt and Greg ride off with her. Meanwhile, the Beast reminds the Woodsman that the flame inside his lantern contains his daughter's soul, and that he must cut down Edelwood trees so the fire can keep her alive.