You will seek the assistance of the foremost aetheric researcher of Sharlayan.
This quest is available if you have completed the quest Tataru's Surprise.
Starting the Quest
Talk to Y'shtola in Gridania to begin the quest.
Speak with Alphinaud
Go to the Ishgard Aetheryte Plaza and go east to the quest icon. Talk to Alphinaud to proceed.
Speak with Y'shtola
Go to Tailfeather in the Dravanian Forelands. Go to the quest icon on the map and talk to Y'shtola to complete the quest.
Next Main Scenario Quest
After you complete the quest, you will need to be at least level 58 to proceed to the next quest. After you reach level 58, talk to Y'shtola to accept the next quest: A Great New Nation.