This page explains how to complete the level 86 Endwalker quest "Hope Upon a Flower".
This quest is available if you have completed the quest Return to the Crystarium.
Starting the Quest
Talk to Ryne in the Crystarium to begin the quest.
Speak with the Crystarium Gatekeep
Go north to the Aethernet Shard and use it to go to the Dossal Gate. Go east up the stairs and talk to the Crystarium Gatekeep. Say Yes to proceed. There will be a cutscene.
Explore the Facility
Check on the Black-robed Man, the Aetheryte-like Device, the Guide-like Man, and the Conversing Woman.
Examine the Door
Go to the middle of the south wall and check on the sparkling Sturdy Door. There will be a cutscene. This one is important, so it is recommended to watch it either now or via the Unending Journey in an inn room.
Speak with ???
Speak with to complete the quest.
Next Main Scenario Quest
After you complete the quest, talk to to accept the next quest: Petalouda Hunt.