This page explains how to complete the level 86 Endwalker quest "In Search of Hermes".
This quest is available if you have completed the quest Petalouda Hunt.
Starting the Quest
Talk to Hythlodaeus in Elpis to begin the quest.
Speak with the Anagnorisis Observer
Go north to where the orange arrow is pointing in the minimap. Talk to the Anagnorisis Observer to proceed. There will be a cutscene.
Search for Hermes
Go north to the orange circle on the map. Go to the northeast part of the orange circle and talk to Hermes to proceed. There will be a cutscene.
Attune to the Aetheryte
Before you proceed, you may wish to go northwest and attune to the Anagnorisis Aetheryte.
Search for the Adventurous Ambystoma
Go east to the orange circle on the map. Go to the northeast part of the orange circle and check on the Adventurous Ambystoma to complete the quest. There will be a cutscene.
Next Main Scenario Quest
After you complete the quest, talk to Hermes to accept the next quest: Ponder, Warrant, Cherish, Welcome.