To open the Crystal Tree Cave Precious Chest in Genshin Impact 7.2, guide two Crystal Moth groups to the flowers, then defeat the spawned enemies.
The chest sits in the cave's upper section beside two dormant crystal flowers. You need a carried Light Crystal to attract the insects, and restoring both flowers sets up the final encounter. This is the sealed chest near the upper waypoint, separate from the cave's purple-bush and beam puzzles.
Where to find the sealed Precious Chest
Travel to the upper Teleport Waypoint inside Crystal Tree Cave, then head slightly west. Look for a Precious Chest enclosed by a protective barrier, with two unopened crystal flowers nearby.
The cave becomes accessible as you progress through the Novokitezhgrad World Quest series. If you still need to reach the underground area, follow the Genshin Impact Crystal-Tree Grotto access route first.
Icy platforms, ruined pillars, and large Everfrost formations surround the puzzle. Both moth groups are close to the chest, so keep your search within this area instead of exploring the entire cave.
Compare the two moth locations
Use the chest as your starting landmark. The two groups occupy different spots, but both use the same attraction and flower interaction mechanics.
| Crystal Moth group | Where to look | Where to lead it |
|---|---|---|
| Ice-platform group | Around a large chunk of ice on the platform behind the chest | The nearest dormant crystal flower |
| Ruined-pillar group | Beside a broken stone pillar close to the chest | The remaining unopened crystal flower |
How to restore both crystal flowers
Create and carry a Light Crystal
Use the Everfrost creation ability to produce a Light Crystal, then pick it up. You must carry the crystal toward the moths so they respond to its glow.
Approach a group and watch for the insects to begin following you before heading toward a flower. Walking to the plant without attracting its moth group does not complete the delivery.
Carry the light to the moths
Lead the first group from behind the chest
Stand near the sealed chest and look toward the icy platform behind it. Find the large chunk of ice with Crystal Moths circling around it.
Follow this sequence:
- Approach the circling insects while carrying the Light Crystal.
- Wait until the moths follow the light.
- Lead them toward the nearest dormant crystal flower.
- Stand beside the plant and use Channel Light to direct the light into it.
The moths transfer to the flower, and its crystal petals open. Use the opened petals as your progress check before moving to the other group.
Lead the ice-platform group
Lead the second group from the ruined pillar
Return toward the chest and inspect the nearby ruined stone structures. The remaining Crystal Moths are beside a broken pillar.
Attract them with the Light Crystal, then lead them to the flower that is still closed. Stay beside that plant until its light-direction interaction becomes available.
Activate the interaction to transfer the second group into the plant. You do not need to move the moths between flowers or return them to their original locations.
Defeat the final enemy group
The encounter contains three enemies:
- Two Electro Whopperflowers.
- One Icy Reflection.
Use damage that can hit multiple targets when the enemies are close together. The Whopperflowers can move away from each other, so adjust your position if your attacks stop reaching both.
Pyro attacks can help against the Cryo-based Icy Reflection. Keep moving to avoid incoming attacks, and finish every remaining target before returning to the chest.
Check that you are at the right cave puzzle
Several challenges in Crystal Tree Cave involve flowers or light, but their moth locations and completion steps differ. If the landmarks do not match the ice platform and broken pillar, identify the challenge before searching farther away.
| Challenge | Distinctive landmarks | Main task |
|---|---|---|
| Upper sealed Precious Chest | Chest near the upper waypoint, an icy platform, and a ruined pillar | Deliver two visible moth groups, then clear the final fight |
| Crystal Vegetation | Three searchable purple bushes near a ruined building | Search the bushes to reveal the moths needed by the flowers |
| Iron tree | A courtyard beside a ruined tower in the Hidden Tributary | Find the tower moth and the moth associated with a wall inscription |
| Blightkristall | Cracked black crystals and Light-Focusing Pedestals | Redirect Luminous Beams to clear the obstruction |
For cracked black crystals and beam pedestals, follow the Genshin Impact Crystal-Tree Grotto Luminous Lamp puzzle solution. That challenge opens a different Precious Chest and includes a route to a hidden Cryoculus.
Remove the barrier and claim the rewards
The barrier disappears automatically once the final enemy falls. No extra device activation is required afterward.
If the chest remains sealed, check the two completion requirements: both flowers must be fully open, and all three spawned enemies must be defeated. Finding the moths without completing their flower interactions leaves the puzzle unfinished.
Open the Precious Chest to collect Primogems, Cryo Sigils, and other exploration materials.
