Among the 80 Lumenspar players need to collect inGenshin Impact, one Lumenspar is locked behind a gate. Unfortunately, unlike the door west of the Ad-Hoc Main Tunnel that can beunlocked withGenshin ImpactMiner’s Key, this gate can’t be opened with one. So Travelers shouldn’t waste time finding ways to unlock it.

In the Underground Chasm, there’s a secret path that will transportGenshin Impactplayers to the surface. Finding this spot will reward them with theAll We Need Is Some Firewood and Some Vinegarachievement.However, secret entrances in The Chasm don’t stop there. There’s also another secret entry players can find to get them fromthe surface to the Underground Chasm. This will lead Travelers to the Lumenspar locked behind a gate inGenshin Impact.

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How To Get The Lumenspar Locked Behind A Gate In Genshin Impact

To get the Lumenspar locked behind a gate in the Underground Chasm,Genshin Impactplayers have to enter the Den of Thieves from the surface. To do so, Travelers need to collect two Treasure Map Fragments first.

First Treasure Map Fragment Location

The first Treasure Map Fragment can be found in a bag under the Treasure Hoarders’ tent. Players can do it any time, but it’s highly recommended to do it while following Yanbo the Millelith’sUndetected InfiltrationQuest.

At the end of the Millelith’s mission, Travelers willget a Cup of Commons inGenshin Impact.

first treasure map fragment location in genshin impact

Second Treasure Map Fragment Location

As for the second Treasure Map Fragment,Genshin Impactplayers can find it in a satchel east of the Ad-Hoc Main Tunnel.

How To Enter The Den Of Thieves

After finding both of the Treasure Map Fragments, Travelers will get a Treasure Hoarders' Treasure Map. Now, go to the marked spot and find a tent with bombs next to it.

Next, burn the hay under the tent using Pyro or the bombs. This will reveal a secret trap door. Press the button to enter the Den of Thieves.

second treasure map fragment location in genshin impact

Afterward, the character will be transported to the Underground Chasm. OneGenshin ImpactExquisite Chest and one Precious Chest will sit up ahead for people to claim.

For finding the secret entry, Travelers will earn theDen of ThievesAchievement and gain access to theGenshin ImpactLumenspar locked behind the gate. Players will be able to open the gate from this side of the room.

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CollectingLumenspar inGenshin Impactis importantfor Underground Chasm’s exploration. This item is used to upgrade theLumenstone Adjuvant, where a special ability will unlock at levels two, six, eight, and nine. Meanwhile, there’s no special skill on level 10 (maximum level), but players will get a new Namecard,Lumens: Stone of Light.

Genshin Impactis now available on Mobile, PC, PS4, and PS5. A Switch version is in development.

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lumenstone adjuvant level 10 rewards