FFXIV: How to unlock Eureka Orthos, a new deep dungeon in patch 6.35

FFXIV: Endwalker”patch 6.35 adds a third deep dungeon, Eureka Orthos, a laboratory deep beneath the Crystal Tower, where the Allagan Empire conducted research into immortality, cloning, and divine control. It’s up to you, the Warrior of Light, to uncover the lab’s buried secrets and bring them to light.

Deep dungeons are multi-story roguelite instances that have their own level system and items. Defeat the enemies inside to level up and move to the next floor, and open chests to get items and upgrade your gear. You can enter the dungeon solo or with up to four people in your party, and you have two save slots to keep your progress.

Continue to find out where to unlock Eureka Orthos and learn the differences between it and Heaven on High and the Palace of the Dead.

How to unlock Eureka Orthos in FFXIV

To unlock Eureka Orthos, you must meet the following prerequisites:

• Complete the main quest of the “Endwalker” scenario.
• Complete floor 50 of the Palace of the Dead.
• Have at least one War or Magic apprentice (excluding Restricted Professions) at level 81

Once you get them, talk to them Koh Rabntah in Mor Dhon to start the “Dive into Myth” quest. If you have trouble locating them, take a look at the picture below.

Graphics: Johnny Yu/Polygon | Image credit: Square Enix

How to enter Eureka Orthos in FFXIV

After completing the “Dive into the Myth” quest, talk to Khatun in Mor Dhon enter Eureka Orthos. If you don’t want to go all the way to Khatun, you can talk to him Burnel in Mor Dhona to teleport to the entrance. If you’re having trouble finding any of them, browse the image gallery below to see their location.

Mesh view

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  Graphics: Johnny Yu/Polygon | Image credit: Square Enix
  

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  Graphics: Johnny Yu/Polygon | Image credit: Square Enix
  

The players will start on the first floor first, but you may start on the 21st floor if you meet the following prerequisites:

• Clear floor 30 Eureka Orthos.
• Complete the quest “Wrath Extinguished”.

How to unlock the quest “Wrath Extinguished” in FFXIV

Graphics: Johnny Yu/Polygon | Image credit: Square Enix

To unlock the quest “Wrath Extinguished”, you must first clear the 30th floor of Eureka Orthos. Later, talk to Koh Rabntah in Mor Dhona to start the task.

Differences between Eureka Orthos and other deep dungeons

The main differences between Eureka Orthos and other deep dungeons are terrifying beasts AND halfway. Minor changes include a name change from several name changes from pomanders to protomanders, cairns to pillars, and several different protomanders.

Scary Beasts

Photo: Square Enix via Polygon

Dire beasts are much stronger than the average monster in Eureka Orthos, but once you defeat them, you’ll receive a buff. Scary beasts are easily identifiable by the glow around them, so keep an eye out for enemies that are surrounded by an active animation.

Be very careful around scary beasts because they will kill you with one automatic attack. Make sure you have the right protomanders and a high level Aether pool to take on them.

Semi-clones

Graphics: Johnny Yu/Polygon | Image credit: Square Enix

Half-clones take over the Magicites from Heaven-on-High in Eureka Orthos, but they don’t function the same as the Magicites. Demiclones will not destroy the floor, but will instead summon a demiclone to fight alongside you. Each half-clone has its own set of skills that correspond to each of the three roles: DPS, healer, and defender. There is a chance to get Demiclones by opening Silver Coffers inside Eureka Orthos.

Eureka Orthos Awards

After completing the Eureka Orthos instance, you will receive rewards based on your level and progress.

If you are level 90 when you enter, you will receive Allagan and gil headstones based on completed floors. For more detailed information, please refer to the table below.

If you are level 81 to 90 at the time of entry, you will receive experience points, gil, and Allagan poetic tomestones based on the floors you complete. For more detailed information, please refer to the table below.

If you’ve completed floors above 30, you’ll receive an Orthos Aether Pool Fragment to trade for synthesis node in Mor Dhona.

Graphics: Johnny Yu/Polygon | Image credit: Square Enix

For the full list of rewards you can earn with Orthos Aether Pool Fragments, check out the table below.

Orthos Aetherpool equipment

As with other deep dungeons, you can preserve your etherpool equipment by replacing aetherpool Orthos holders. If you have buffed your Orthos Aether Pool Arm and Armor to +10 and completed the “Quenched Rage” side quest, you can synthesize an Orthos Aether Pool Grip which will reduce the strength of your Aether Arm and Armor by 10.