In Clair Obscur: Expedition 33, youâll come across quests where you can help out the expeditionâs enemies, Nevrons. While most Nevrons are hostile, there are a few thatâll ask for help. One early Nevron quest takes place in the Flying Waters dungeon with a fellow named Demineur.
Unlike with Jar, Demineurâs side quest is completely optional. At this point, you should have Gustave, Lune, and Maelle. You can actually attack Demineur as soon as you meet them, but you should probably hear them out first.
Read More: A Beginnerâs Guide To Mastering Lune In Clair Obscur: Expedition 33
Sparing Demineur will grant you much better rewards down the line. If youâd rather have immediate gratification, you can go ahead and attack them. But youâll also be permanently missing out on an exclusive weapon for Lune.
Finding Demineurâs Impact Mine
| Action | Reward |
|---|---|
| Give Deminieur the Impact Mine | Luneâs Deminerim weapon |
| Attack Deminuer | 3x Color of Lumina |
| Attack Demineur | 1x Chroma Catalyst |
In the Flying Waters dungeon, start at the Expedition 59 save point called Nocoâs Hut and then go forward. As you come out of the end of the valley, youâll see two enemies in front of a giant structure. Circle around the structure by going to the left and then to the right.

Continue until you come across a giant jar tunnel and go inside of it. After coming out from the other end, youâll find Demineur. When interacting with them, instead of selecting âAttack,â select âExamineâ instead.
The group will mention that this specific Nevron typically carries a mine. However, Demineur doesnât have one and then the group decides to find one for them.

After speaking with Demineur, go to the right and youâll see a small platforming puzzle in front of you. After finishing the first few jumps, look to your right again and you should see a glowing pink item on the ground. Jump on the platforms to reach it and youâll pick up the âImpact Mine.â

Now just head back to Demineur and hand the item to them. They will give you the Luneâs Deminerim weapon. This weapon focuses on lightning elemental damage and provides abilities such as reducing the AP cost and increasing the damage of lightning skills.
Should you attack Demineur?
You can attack Demineur either before or after completing their quest. If you do so before, then you will lose out on Lunaâs Deminerim weapon. Your reward for defeating them will be the same as defeating Jar: 3x Colour of Lumina and 1x Chroma Catalyst.
The better long-term decision is to leave Demineur alone, as your reward will be much greater later on.
Read More: A Beginnerâs Guide To Mastering Gustave In Clair Obscur: Expedition 33
In Act Three of the game, youâll unlock the ability to fly around with Esquie. Fly to the area next to the Spring Meadows area called The Fountain and youâll find Blanche. If youâve spared Demineur, as well as the other Nevrons that provided quests throughout the game, Blanche will reward you with 100x Colour of Lumina
However, if youâve killed any of those Nevrons, including Demineur, Blanche will attack you. Itâs a challenging fight, so youâll want to be at least level 80 if you intend to take Blanche on. Defeating Blanche will earn you 10x Colour of Lumina and 2x Grandiose Chroma Catalyst.
100x Colour of Lumina is definitely a much better reward than the 3x Colour of Lumina gained from defeating Demineur, which is why we recommend sparing them.
Alternatively, after receiving the 100x Colour of Lumina from Blanche, you can go back to the Flying Waters to kill Demineur and get those.
Clair Obscur: Expedition 33 is available now on PS5, Xbox Series X/S, and Windows PCs.