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 present 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 in Genshin Impact:
Burning Firestone #1:
The first Firestone is obtained automatically after the cutscene with Bona concludes. The Little One will retrieve it. Players must then activate the bridge lift mechanism, interact with the Saurian, speak with Bona, and watch another cutscene.
Burning Firestone #2:
The second Firestone is located on the northeastern isle. Players must rotate the right and left floating isle mechanisms, cross the extended bridge, raise the lift, and follow the Little One. Along the way, collect a Common Chest. Activate the mechanism near the Firestone, climb the platforms, defeat an enemy, and collect an Exquisite Chest. Use the mechanism behind the chest to open a gate, descend to the Saurian, unlock the door, and instruct the Little One to return to the altar.
Burning Firestone #3:
To obtain the third Firestone, rotate the right and northern floating isle mechanisms, cross the bridge to the northern isle's lower level, and follow the Little One. Observe the Secret Source Sentinel carrying the Firestone to the southwestern isle. Players must then ride a Qucusaurus to reach the Pyroculus, activate the tower mechanism, transform into a Qucusaurus again, fly to the unlocked door, activate the elevator, interact with the Saurian, follow it, activate the lift, and proceed to the Altar of Primal of Flame.
Burning Firestone #4:
The final Firestone is on the northwestern isle’s upper level. Cross the northwestern bridge, utilize Bona to tilt the bridge upward, glide to the northern isle's upper level, lower the lift, follow the Little One, instruct it to return to the altar, defeat enemies, and again ask the Saurian to return to the altar. Collect a Precious Chest before reaching the Altar.
Offering all four Firestones to the Altar completes The Flowing Primal Flame Quest, triggering a cutscene where the Jade of Return transforms 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.
