Zero has something to discuss with you.
Requirements
This quest is available if you have completed the quest A Grave Presentiment.
Starting the Quest
Talk to Zero on the Red Moon (accessible from Mare Lamentorum) to begin the quest.
Speak with Golbez
Go northwest to where the orange arrow is pointing in the minimap, then talk to Golbez. Say Yes if you are ready.
Speak with Zero
Talk to Zero to proceed, then go southwest to where the orange arrow is pointing in the minimap and talk to Zero once more.
Use the Aether Transmitter
Check on the Aether Transmitter to pick it up, then exit the room. You can use a mount in this area. Go east, then turn right and go up the ramp, up the stairs, then go east to where the orange arrow is pointing in the minimap. (If you went past the voidsent with many eyes, you went too far.) Dismount and target the sparkling Destination, and then you can either examine or target it and use the Aether Transmitter 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.
Speak with Zero Again
Talk to Zero to proceed. Say Yes if you're ready to leave the area.
Speak with Livingway
Talk to Livingway to complete the quest.
Next Main Scenario Quest
After you complete the quest, talk to Alphinaud to accept the next quest: Trail to the Heavens.

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