Talk to Rojaireaut to have him apply the ointment. This caps your level at 25, but buffs do not wear off, so apply strong, lasting buffs before receiving the ointment.
Make sure everyone gets the ointment. If any alliance member does not receive it, then the monster will not spawn.
From Rojaireaut take the path to the left (head east, through the puddle) and take the long corridor.
Use Circumspection from the Grounds Tome to receive sneak and invisible.
The room here opens up at (G-7). Enter the tunnel at G-8.
The ??? is located in the southwest corner of a small room on a stalagmite. The ??? is at (G-9) of the first map, northeast corner. The designated tank/puller should spawn the NM Necroplasm by touching the ???.
This ??? used to be at G-10. It was moved in a version update.
Defeat the Necroplasm. For this fight, only those with the level cap can assist in this fight. Anyone else trying to help will receive a message telling them they cannot.
Only one Eco-Warrior quest can be completed once per Conquest Tally.
All members must have accepted the quest.
With a number of high-damaging jobs (SMN, RNG, or even WAR or SAM, etc.) using their 2 hour abilities and level 99 buffs from before receiving the ointment, the NM can be defeated by as few as 2-3 people. Astral FlowInferno is the most damaging attack to this NM. However, this Eco-Warrior boss has the most HP of all Eco-Warrior NMs, so be careful.