In Episode 15 Echoes of the Singing Caverns Nancy and her companion Kael delve into her fathers journal while tracking fragments of the Tree of Life After narrowly escaping danger in the Whispering Woods they witness the compass light up with a map leading to the Singing Caverns known for their enchanting melodies and potential peril Inside the caverns they discover a fragment but are confronted by the enigmatic Blackthorn who hints at hidden truths about Nancys heritage and her fathers secrets Amidst a collapsing chamber Nancy seizes the fragment momentarily stabilizing the chaos and they escape just as the caverns seal shut Back in the Nexus Nancy grapples with the implications of her connection to the Tree and the looming threat posed by Blackthorn reaffirming her role as its Guardian as they prepare for the challenges ahead