This page explains how to complete the level 85 Endwalker quest "Skies Aflame".
This quest is available if you have completed the quest Returning Home.
Starting the Quest
Talk to Tataru in Old Sharlayan to begin the quest.
Head to the Main Hall
Check on the Main Hall Entrance and say Yes to proceed. There will be a cutscene.
Journey to Thavnair
You can either teleport to Yedlihmad, or you can check on the Main Hall Exit and say Yes, then go outside and go to the northeast and enter the neighboring building. Talk to Kytte and say Yes to go to Thavnair (you won't get aether sickness anymore).
Once in Thavnair, there will be a cutscene.
Speak with Ahewann
Talk to Ahewann to proceed. There will be a cutscene.
Use the Duty Finder or Duty Support to enter Vanaspati. Please see the Vanaspati Guide for a walkthrough.
After you complete the duty in Vanaspati and exit the area, there will be a cutscene.
Speak with Ahewann Again
Talk to Ahewann to complete the quest.
Next Main Scenario Quest
After you complete the quest, talk to Ahewann to accept the next quest: The Blasphemy Unmasked.