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Sea Mushroom

Kill Ocean Guardians in the Atlantic Ocean to collect 20 sea mushrooms, then report to Yuril.
 

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Introduction

Taran found a way to clean the Golden Vessels, he will need you to collect two materials. The first is the strongly alkaline sea mushroom carried by the Ruin Guardians in the Atlantic Ocean. The second material is more rare, Yuril will tell you more after you gather the mushrooms.

NPC Dialog

I read dozens of books until I found the answer. I
will need two things in order to clean the Golden
Vessels. Firstly, I need the sea mushrooms carried
by the Ocean Guardians of the Atlantic Ocean.
These mushrooms have basic properties which will
neutralize the acid of the seaweed.

Quest Completion

Whew, what a smell! Who would want to use this
plant to clean anything?! There's one more material
you need to collect.