You have retrieved Toddia's heartstone, and the service can now proceed as planned.
This quest is available if you have completed the quest Lost but Not Forgotten.
Starting the Quest
Talk to Runar in the Rak'tika Greatwood to begin the quest.
Speak with Minfilia
Talk to Minfilia to proceed.
Speak with the Placid Elder
Go south through the doorway and through the tunnel to the quest icon on the map. Talk to the Placid Elder to proceed.
Place the Candle at the Destination
Go to the quest icon on the map. Dismount and target the sparkling Destination, and then you can either examine or target it and use the Blue-flamed Candle on it from the Key Items section of your inventory, or you can target it and use the icon to the right of the quest name in your list of active quests.
Wait at the Destination
Go to the quest icon on the map and check on the sparkling Destination. There will be a cutscene.
Speak with Y'shtola
Go north through the tunnel to the outside, then go through the first door on the right. Talk to Y'shtola to complete the quest.
Next Main Scenario Quest
After you complete the quest, talk to Y'shtola to accept the next quest: Stirring Up Trouble. There will be a cutscene.