Before doing the dungeon, I recommend picking up the Krosmoz quest "Where Did the 7th Company Go?".
The first time you do the dungeon, you will not be able to use the keychain.
Monsters
Rabid Ouginak
Ouginak Déchaîné
Lvl 60 to 72
780–1000 HP
6 AP
5 MP
0%
0%
0%
60–72%
0%
Reinforced Scurvion
Scorbute Renforcé
Lvl 60 to 72
780–1000 HP
5 AP
4 MP
5%
10%
20–24%
60–72%
10%
Lab Kolerat
Kolérat de Laboratoire
Lvl 58 to 70
880–1200 HP
5 AP
4 MP
0%
0%
0%
58–70%
0%
Terrestrial Crobak
Corbac Terrien
Lvl 54 to 66
650–910 HP
6 AP
10 MP
10–26%
-26–-10%
10–26%
54–66%
10–26%
Rooms
Room 1
Room 2
Room 3
Boss
Nelween ★
Lvl 70
1900–2700 HP
8 AP
5 MP
30%
0%
0%
0%
0%
Dungeon mechanics
Be very careful with damage reflection and poisons. It is best to finish the fight quickly.
Achievements
End of the dungeon
To leave the dungeon, talk to Brumen Tinctorias (don't panic, no new fight will start).