Synthesize the Miasmal Counteragent; it is Alchemy but can be made with zero skill. You must have received the key item for the synthesis to work.
Find one of the miasma clouds that block paths in the area, target it, and trade one Miasmal Counteragent- the miasma stream will dissipate and you can walk through it. Most on the mountain in the area are untargetable and can't be used.
IMPORTANT: You only need to trade one item. You receive no message upon trading the item, but as long as you lose one, the item worked and you are done.
Locations Miasma Clouds have been spotted.
The targeted name is "Dark Miasma"
(J-9) near the Taru Resistance Fighter on Parradamo Tor
An astute alchemist has concluded that the miasmas seeping up through fissures in the ground are contributing to the tainted air. Follow the recipe he entrusted to you to synthesize the counteragent, test it on a miasma, then report back with your findings.