This page explains how to complete the level 90 post-Endwalker quest "Where Everything Begins".
Requirements
This quest is available if you have completed the quest Shadowed Remnants.
Starting the Quest
Talk to the Dark-robed Voidsent in the Fell Court of Troia (accessible via Thavnair) to begin the quest.
Speak with the Dark-robed Voidsent
Go east and follow the path to the quest icon. Talk to the Dark-robed Voidsent to proceed. There will be a cutscene.
Speak with Varshahn
Talk to Varshahn to proceed.
Speak with Zero in the Seat of the Foremost
Go east and check on the Passage to Troia Keep, and say Yes to proceed. Go east and follow the path until you reach the quest icon. There will be a glow around Zero, indicating a solo duty. Check on her and there will be several cutscenes in sequence, followed by a battle. Click Proceed if you are ready.
Solo Duty: Where Everything Begins
Part 1
When the battle begins, only attack the enemies that have a red dot in the enemies list, and ignore the rest. If none of them has a red dot, focus on the enemy with the lowest health.
When the enemies reappear, repeat the process.
When five circle attack markers appear, stand in a safe area. More circle attack markers will appear after a moment. Wait for the original attack markers to disappear, and move into one of the safe areas that they leave behind.
Void Gravity markers everyone with circle attack markers that follow them. Spread apart from your allies to avoid overlapping your attack markers with each other.
When the enemies reappear, repeat the process.
Void Vortex places a stack marker on a random person. If you have the stack marker, move toward your allies and stand still to stack together. If someone else has the stack marker, move toward them to stack together.
Eventually, there will be a cutscene.
Part 2
Cursed Noise damages everyone.
When Plundered Maids appear, wait for Zero to defeat one of them, and move into the safe area that is left behind.
When the boss starts casting Blighted Buffet, stay away from the unsafe area in the center, and wait for Zero to defeat one of the Plundered Maids, then move into the safe area that is left behind. Stay near the boss or use a knockback prevention move to avoid being knocked into the unsafe outer ring by Blighted Buffet.
Void Quake III creates two line attack markers originating from the boss in a + shape. Stay in the center and wait for Zero to defeat one of the untargetable Plundered Guards, then move into the safe area that is left behind.
When the boss casts Blighted Sweep, stay behind him to avoid the attack that hits the entire area in front of the boss.
Cursebind traps Zero in fetters. Attack the Filthy Shackle until it is destroyed, then move behind the boss to get away from the Blighted Swathe attack marker.
Rotten Rampage places a number of circle attack markers throughout the area, and marks everyone with circle attack markers that follow them. Find a safe area between circle attack markers that is not occupied by one of your allies.
The boss will float upward while casting Blighted Bladework, and will point its sword at an angle at the floor. After a moment, a red line will point from the sword to the ground. There will soon be a very large circle attack that is centered on the spot that the sword is pointing at, so move far away from that spot.
The boss will land at the location where the sword had been pointing, and then will turn around and cast Blighted Sweep, hitting the entire area that the boss is facing. Quickly run behind the boss to avoid this attack.
Firedamp is a high-damage attack on the player highest in the enmity list. It will also hit any players in the circle indicator around the tank, so other players should be sure not to stand in the circle indicator.
When Varshahn creates a green barrier, stand under it while continuing to attack the boss.
After the boss is defeated, there will be a cutscene.
Speak with Y'shtola
Talk to Y'shtola to complete the quest.
Next Main Scenario Quest
After you complete the quest, talk to Estinien to accept the next quest: Groping in the Dark. There will be a cutscene.