The Great Tree's Secret

Uncover The Great Tree's secret in Honkai: Star Rail. This guide explains the lore, puzzle solutions, and hidden paths within this intriguing Penacony area.

The Great Tree's Secret is a pivotal story expansion introduced in the 2026 updates, delving deeper into the lore of the planet Penacony. This questline requires players to have reached Trailblaze Level 50 and completed the "Mirror of the Past" mission. The core mechanic revolves around interacting with the sentient Great Tree, which communicates through a series of riddles and environmental puzzles. To uncover its secrets, Trailblazers must gather "Whispers of the Ancients" scattered across the Whispering Woods biome. These whispers are often found in chests or dropped by specific enemies, such as the elusive Lumina Sprites that have a 20% chance to drop one upon defeat. A key puzzle involves aligning ancient runes on the Great Tree's bark, a process that requires deciphering clues found in nearby ruins. Failure to al the runes correctly within three attempts will trigger a combat encounter with three Guardian Treants, each possessing a substantial HP pool of over 50,000. Successfully completing this section unlocks a new area within Penacony, the Sunken Grove, and grants access to the new 5-star character, Firefly, for a limited trial. The narrative progression also sheds light on the origins of the Stellaron Hunters, particularly Acheron Feixiao, and her connection to the cosmic anomalies plaguing the galaxy.