The Mycological Investigation in The Chasm is a quick World Quest that involves collecting Starshrooms from the Underground Mine. To unlock it, you must firstcompletethe third part of The Chasm Delvers World Questline:The Chasm Spelunkers. This will allow you to explore the Underground Mine.
Speak toKhedive, the Sumeru researcher in the base camp. Select the dialogue optionSo, about those mushrooms…He’ll ask you to collect eight Starshrooms.
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Keep in mind that the Underground Mine won’t be lit up in the World Map until you progress in The Chasm Delvers. But you can still explore the above locations to collect the mushrooms.
After collecting eight Starshrooms, head back to Khedive and choose the optionHere’s the mushrooms you asked for. He’ll reveal that Starshrooms are of Sumeru origin, but they glow due to an abnormal ecological phenomenon. You’ll be rewarded 20 Primogems for your work.
Check out our guide onHow to solve the Geo Monument puzzle in the west pool of the Underground Waterway — Genshin Impactto get a Precious Chest.