FFXIV: Endwalker’s patch 6.35 adds the third deep dungeon, Eureka Orthos, a laboratory deep beneath the Crystal Tower where the Allagan Empire researched immortality, cloning, and dominion over the divine. It’s up to you, the Warrior of Light, to uncover and uncover the lab’s hidden secrets.
Deep dungeons are multi-level roguelite instances that have their own leveling system and items. Defeat the enemies within to level up and move to the next floor, and open chests to receive items and upgrade your gear. You can enter the dungeon solo or with up to four people in a group, and you have two safe slots to track your progress.
Continue to find out where to unlock Eureka Orthos and to learn the differences between it and Heaven-on-High and Palace of the Dead.
How to unlock Eureka Orthos in FFXIV
To unlock Eureka Orthos, you must meet the following conditions:
- Complete the quest for the main scenario”Runner.”
- Complete level 50 of the Palace of the Dead.
- Have at least one Disciple of War or Magic (excluding limited jobs) at level 81
Once you have it, talk to it Koh Rabntah in Mor Dhona to start the “Delve into Myth” quest. If you’re having trouble finding them, check out the image below.
Image: Johnny Yu/Polygoon | Image source: Square Enix
How to enter Eureka Orthos in FFXIV
After completing “Delve into Myth”, talk to Khatun in Mor Dhona to enter Eureka Orthos. If you don’t want to travel all the way to Khatun you can talk to Burnel in Mor Dhona to teleport to the entrance. If you’re having trouble finding either one, check out the image gallery below to see their locations.
Players start on floor one first, but you can start on floor 21 if you have met the following conditions:
- Clear floor 30 of Eureka Orthos.
- Complete the quest ‘Rage Extinguished’.
How to unlock the ‘Rage Extinguished’ quest in FFXIV
Image: Johnny Yu/Polygoon | Source image: Square Enix
To unlock the “Rage Extinguished” quest, you must first complete level 30 of Eureka Orthos. Subsequently, speak to Koh Rabntah in Mor Dhona to start the search.
Differences between Eureka Orthos and the other deep dungeons
The main differences between Eureka Orthos and the other deep dungeons are the dreaded beasts And demiclones. Smaller changes include the name change of a few name changes from pomanders to protomanders, cairns to pillars, and a few different protomanders.
Dreaded beasts
Image: Square Enix via Polygon
Dread beasts are much stronger than the average monster in Eureka Orthos, but once you defeat one you will receive a buff. Terrifying beasts can be easily spotted by the glow around them, so keep an eye out for enemies that have active animation around them.
Be very careful around dreaded beasts because they will shoot you in one automatic attack. Make sure you have the right protomanders and a high aetherpool level to take it on.
Demiclones
Image: Johnny Yu/Polygoon | Source image: Square Enix
Demiclones take over from Magicites from Heaven-on-High in Eureka Orthos, but they don’t function the same as Magicites. Demiclones don’t wipe the floor, but instead summon a demiclone to fight alongside you. Each demiclone has its own skills suitable for each of the three roles: DPS, Healer, and Tank. There is a chance to get Demiclones by opening Silver Coffers in Eureka Orthos.
Eureka Orthos Rewards
Once you complete a copy of Eureka Orthos, you will receive rewards depending on your level and progress.
If you are level 90 when you enter, you will receive Allagan tomestones and scream based on the completed floors. Refer to the table below for more detailed information.
Level 90 rewards for Eureka Orthos in FFXIV
| Floor | Reward |
|---|---|
| Floor | Reward |
| Floor 10 | 10 Allagan Tombstones of Poetics, 20 Allagan Tombstones of Astronomy, 5 Allagan Tombstones of Casualness, 1,000 gil |
| Floor 20 | 20 Allagan Tombstones of Poetics, 40 Allagan Tombstones of Astronomy, 10 Allagan Tombstones of Casualness, 1,500 gil |
| Floor 30 and above | 30 Allagan Tombstones of Poetics, 60 Allagan Tombstones of Astronomy, 10 Allagan Tombstones of Causality, 2,000 gil |
If you are between level 81 and 90 when you enter, you will receive experience points, gil, and Allagan gems of poetics based on the completed floors. Refer to the table below for more detailed information.
Between level 81 – 90 rewards for Eureka Orthos in FFXIV
| Floor | Reward |
|---|---|
| Floor | Reward |
| Floor 10 | 10 Allagan Tombstones of Poetics, Experience, 1,000 gil |
| Floor 20 | 20 Allagan Tombstones of Poetics, Experience, 1,500 gil |
| Floor 30 and above | 30 Allagan Tombstones of Poetics, Experience, 2,000 gil |
If you complete the floors above 30 you will receive an Orthos aetherpool fragment that can be exchanged for the synthesis hub in Mor Dhona.
Image: Johnny Yu/Polygoon | Image source: Square Enix
Refer to the table below for a full list of the rewards you can get with Orthos aetherpool fragments.
Orthos Aetherpool Fragment Rewards
| Item | Orthos Aetherpool Fragment Cost |
|---|---|
| Item | Orthos Aetherpool Fragment Cost |
| Orthos drink | 1 |
| Savage Aim Materia IX | 3 |
| Savage Might Materia IX | 3 |
| Heaven’s Eye Materia IX | 3 |
| Quickarm Materia IX | 3 |
| Rapid Tongue Materia IX | 3 |
| Battledance Materia IX | 3 |
| Piety Materia IX | 3 |
| Savage Aim Materia X | 6 |
| Savage Might Materia X | 6 |
| Heaven’s Eye Materia X | 6 |
| Quickarm Materia X | 6 |
| Quicktongue Materia X | 6 |
| Battledance Materia X | 6 |
| Piety Materia X | 6 |
Orthos Aetherpool Gear
As with the other deep dungeons, you can keep your aetherpool gear by swapping Orthos aetherpool handles. If you’ve boosted your Orthos aetherpool arm and armor to +10, and you’ve completed the “Rage Extinguished” sidequest, you can craft an Orthos aetherpool hold that reduces the strength of your aetherpool arm and armor by 10.