After assisting Bona in purging the Abyssal Corruption from the Chu'ulel Light Core in Genshin Impact, players are tasked with locating the Primal of Flame. Upon finding it, they must offer two Pyrophosphorites to the Altar of Primal of Flame, which they should have gathered during the Palace of the Vision Serpent Quest.
This offering paves the way for players to ascend to Tonatiuh, which hovers above Ochkanatlan’s Cradle of Fleeting Dreams fortress. Reaching this floating island marks the completion of the To the Sky-Road Quest and triggers The Other Side of the Sky Quest in Genshin Impact. At this stage, players are required to collect four Burning Firestones to secure the Jade of Return.
How to Collect the Four Burning Firestones in Genshin Impact
Burning Firestone Location #1

To obtain the first Burning Firestone in Tonatiuh, follow these steps:
- Arrive at Tonatiuh.
- After the cutscene with Bona concludes, the Little One will gather the first Burning Firestone.
- Accompany the Little One to the bridge.
- Activate the mechanism next to the bridge to elevate the lift, allowing it to cross.
- Engage with the little Saurian.
- Converse with Bona.
- Watch another cutscene unfold.
Burning Firestone Location #2
The second Burning Firestone awaits on the northeastern isle. Here's how to secure it:
- Adjust the right floating isle mechanism.
- Adjust the left floating isle mechanism.
- Traverse eastward over the newly extended bridge.
- Elevate the lift.
- Follow the Little One to the second Burning Firestone.
- Collect the Genshin Impact Common chest en route.
- Trigger the mechanism to the right of the Firestone location.
- Climb the platforms that appear to reach the upper level.
- Overcome the enemy.
- Claim the Exquisite chest at the top of the tower.
- Operate the mechanism behind it to unlock the gate.
- Descend to where the little Saurian is located.
- Unlock the door.
- Prompt the Little One with “Let’s return to the altar!”
- Head back to the Altar of Primal of Flame.
Burning Firestone Location #3
To collect the third Burning Firestone in Tonatiuh, players should:
- Rotate the right floating isle mechanism.
- Rotate the northern floating isle mechanism.
- Cross the bridge to the lower level of the northern isle.
- Follow the Little One.
- Observe as the Secret Source Sentinel transports the third Burning Firestone to the southwestern Isle.
- Approach the northwestern edge.
- Possess a Qucusaurus.
- Fly toward the Pyroculus in Genshin Impact.
- Activate the mechanism within the tower.
- Transform into a Qucusaurus again.
- Fly upward to the now-unlocked door.
- Operate the elevator to return to the upper level.
- Interact with the little Saurian.
- Follow it.
- Activate the Lift.
- Proceed to the Altar of Primal of Flame.
Burning Firestone Location #4
The final Burning Firestone is found on the upper level of the northwestern isle. To collect it:
- Traverse the northwestern bridge.
- Request Bona to tilt the bridge upward.
- Leap and glide to the upper level of the northern isle.
- Lower the Lift.
- Follow the Little One.
- Suggest returning to the altar with “Let’s return to the altar!”
- Defeat the enemy that appears using a well-constructed team in Genshin Impact.
- Ask the Saurian to return to the Altar once more.
- Secure the Precious chest.
- Make your way to the Altar of Primal of Flame.
By offering all four Burning Firestones to the Altar of Primal of Flame, players will complete The Flowing Primal Flame Quest in Genshin Impact. Subsequently, a cutscene will showcase the transformation of the Jade of Return into a Golden Entreaty.
The Dragon of the City of Flowing Ash will then emerge, disrupting the journey once again. Follow the Taunted One to the Nursery of Nightmares island to conclude The Other Side of the Sky Quest in Genshin Impact and earn 50 Primogems.