In Genshin Impact, after assisting Bona in purifying the Abyssal Corruption from the Chu'ulel Light Core, players must help her locate the Primal of Flame. Once found, Travelers must offer two Pyrophosphorites (obtained during the Palace of the Vision Serpent Quest) to the Altar of Primal of Flame.
This offering opens a path to Tonatiuh, a floating island above Ochkanatlan’s Cradle of Fleeting Dreams. Reaching Tonatiuh completes the To the Sky-Road Quest and begins The Other Side of the Sky Quest, requiring the collection of four Burning Firestones to acquire the Jade of Return.
Acquiring the Four Burning Firestones:
Burning Firestone #1:
The first Firestone is obtained automatically during a cutscene with Bona and the Little One. Follow the Little One across the bridge (activating the lift mechanism as needed) and interact with the Saurian and Bona.
Burning Firestone #2:
This Firestone is located on the northeastern isle. The process involves manipulating floating isle mechanisms, crossing bridges, activating lifts, and defeating an enemy. Several chests (Common and Exquisite) are also available along the way. Return to the Altar of Primal of Flame after interacting with the Little One.
Burning Firestone #3:
This Firestone's retrieval requires manipulating floating isle mechanics, crossing bridges, and utilizing a Qucusaurus to reach a locked area. Activate the tower mechanism, use the Qucusaurus to fly to the unlocked door, and activate the elevator. After interacting with the Saurian, activate the lift and return to the Altar.
Burning Firestone #4:
The final Firestone is located on the northwestern isle's upper level. Players must use Bona to adjust the bridge, glide to the upper level, lower a lift, and defeat an enemy. A Precious chest is obtainable before returning to the Altar.
Once all four Firestones are offered, The Flowing Primal Flame Quest is completed, transforming the Jade of Return into a Golden Entreaty. The Dragon of the City of Flowing Ash then appears, leading players to the Nursery of Nightmares island to finish The Other Side of the Sky Quest and receive 50 Primogems.
