After assisting Bona in purifying the Chu'ulel Light Core from Abyssal Corruption within Genshin Impact, players must help her locate the Primal of Flame. Once found, Travelers must present two Pyrophosphorites – acquired during the Palace of the Vision Serpent Quest – to the Altar of Primal of Flame.
This offering unlocks access to Tonatiuh, a floating island above Ochkanatlan’s Cradle of Fleeting Dreams. Reaching Tonatiuh completes the To the Sky-Road Quest and initiates The Other Side of the Sky Quest, requiring the collection of four Burning Firestones to obtain the Jade of Return.
Acquiring the Four Burning Firestones in Genshin Impact
Burning Firestone #1
The first Burning Firestone is obtained by:
- Reaching Tonatiuh.
- Completing the cutscene with Bona; the Little One will retrieve the first Firestone.
- Following the Little One to the bridge.
- Activating the bridge mechanism to raise the lift.
- Interacting with the small Saurian.
- Speaking with Bona.
- Completing another cutscene.
Burning Firestone #2
The second Burning Firestone is located on the northeastern isle. The retrieval process involves:
- Rotating the right and left floating isle mechanisms.
- Crossing the extended bridge eastward.
- Raising the lift.
- Following the Little One to the Firestone.
- Opening a Common Chest en route.
- Activating the mechanism to the right of the Firestone.
- Ascending the spawned platforms to the upper level.
- Defeating enemies.
- Opening an Exquisite Chest atop the tower.
- Activating the mechanism to open the gate.
- Descending to the small Saurian.
- Opening the locked door.
- Instructing the Little One to return to the altar.
- Returning to the Altar of Primal of Flame.
Burning Firestone #3
To obtain the third Burning Firestone:
- Rotate the right and northern floating isle mechanisms.
- Cross the bridge to the lower level of the northern isle.
- Follow the Little One.
- Observe the Secret Source Sentinel carrying the Firestone to the southwestern isle.
- Proceed to the northwestern edge.
- Transform into a Qucusaurus.
- Fly towards the Pyroculus.
- Activate the tower mechanism.
- Transform into a Qucusaurus (again).
- Fly to the unlocked door.
- Activate the elevator to return to the upper level.
- Interact with the small Saurian and follow it.
- Activate the lift.
- Return to the Altar of Primal of Flame.
Burning Firestone #4
The final Burning Firestone is on the northwestern isle's upper level:
- Cross the northwestern bridge.
- Request Bona's assistance to raise the bridge.
- Glide to the northern isle's upper level.
- Lower the lift.
- Follow the Little One.
- Instruct the Little One to return to the altar.
- Defeat the spawned enemies.
- Again, instruct the Saurian to return to the altar.
- Open a Precious Chest.
- Return to the Altar of Primal of Flame.
Offering all four Firestones to the Altar completes The Flowing Primal Flame Quest, transforming the Jade of Return into a Golden Entreaty. The Dragon of the City of Flowing Ash then appears, leading to the Nursery of Nightmares and the completion of The Other Side of the Sky Quest, rewarding players with 50 Primogems.