Eureka Orthos is an ever-changing dungeon whose architecture is never quite the same each time players enter the tower. All players will begin at level 81, and only by fighting the enemies within will they be able to gain the strength and experience needed to explore its depths.

Players who choose to leave and return later can continue playing from where they last saved. We challenge all who enter to make it to the last floor!
* Eureka Orthos save data is separate to data used for other Deep Dungeons. Two save data slots are available for Eureka Orthos.

Requirements

Entering Eureka Orthos

Players can enter Eureka Orthos by speaking with Khatun in Mor Dhona. When entering as a party, only the party leader can start the instance.
* All party members must be in Mor Dhona to enter the dungeon.
* As with other Deep Dungeons, it is possible to enter with a cross-world party.

Players may easily access the entrance to Eureka Orthos by speaking with Burnel in Revenant's Toll (X:21.8 Y:8.1) after unlocking the quest "Delve into Myth."

Players who have cleared floor 30 of Eureka Orthos and the sidequest "Rage Extinguished" will be given the option to start from floor 1 or floor 21 when creating a new save file.
When starting from floor 21, players will be set to level 90 and their inventories will be cleared of protomanders and demiclones.

Fixed Party

Players may enter with a group of up to four players, with no restrictions to classes, jobs, or roles.

Matched Party

Similar to the Duty Finder, players may choose to be randomly matched with other players on the same data center. Matched parties will always be comprised of four players. When registering with less than four players, any open party slots will be filled automatically.

Recording Progress

Boss enemies will appear every 10 floors. Upon defeating them, players will be able to record their progress, at which time they may choose to leave the deep dungeon. Please note that progress made in strengthening Orthos aetherpool arms and armor is saved independently and shared across all save data. See below for more details.
* Save data will not be updated in the event you log out or lose connection before defeating the boss and recording your progress.

Floor 31 and Beyond

While floors up to 30 are related to the story of Eureka Orthos, all floors after were created strictly as a challenge for players. For this reason, you cannot enter floors beyond 30 with a matched party. Furthermore, in addition to completing the sidequest "Rage Extinguished," players must meet the following requirements to challenge these floors:

・Start from floor 1 or floor 21 with a fixed party and clear up to floor 30.
・Party KO count must be zero.
Save data with one or more party KOs cannot be used on floor 31 or higher.
* Please be advised that the party KO count will also increase in the event your party abandons the duty or logs out while inside the instance.

Level Requirement	Disciple of War or Magic level 81
Item Level Requirement	-
Number of Participants	1 to 4 Players
Time Limit	60 minutes

Character Growth

Players will start Eureka Orthos at level 81 regardless of their current class or job level. By defeating monsters that appear in the dungeon, players will be able to gain EXP and level their characters up to 100. Your Eureka Orthos level is not directly related to your level outside of the dungeon.

Orthos Aetherpool Gear

Players will be restricted to the use of an Orthos aetherpool arm and Orthos aetherpool armor when inside Eureka Orthos. In addition to gaining levels, players must enhance these items as they progress through the dungeon. Note that Orthos aetherpool armor will take the appearance of your current gear upon entering the instance.
* Normal gear has no effect on your character's attributes inside Eureka Orthos.
* Orthos aetherpool gear progress in Eureka Orthos is tracked separately to that of aetherpool gear in other Deep Dungeons.

Special Items

Protomanders

Players will, on occasion, obtain protomanders from treasure chests within Eureka Orthos. These items have various uses ranging from displaying the entire map of your current floor, to providing party members with beneficial effects. Up to three of each protomander can be held at any time. These items can be found in a shared inventory to be used by all party members.
* Normal items such as potions can still be used independently of this shared inventory.

Protomanders cannot be taken outside of Eureka Orthos. When in a matched party, they cannot be used after the completion of a set of floors. Protomanders that affect the map cannot be overwritten with the same item when their effect is already in play. Please note, however, that they will still be consumed upon use.

Demiclones

Players will, on occasion, obtain tomestones from treasure coffers in Eureka Orthos, which can be used to generate demiclones. These items can be used by all party members once acquired. Up to three tomestones can be held at any time. These items can be found in a shared inventory to be used by all party members. Tomestones cannot be taken outside of the deep dungeon. When in a matched party, they will be reset each time you enter the dungeon.

Demiclones will follow and fight alongside the player who generated them. Each demiclone has unique strengths, so choose carefully to turn the tides in your favor.

Progression

Moving to Lower Floors

Floors are generated at random, and players may only progress by locating and activating the Pylon of Passage on each floor. These pylons have three phases, and will always be inactive when arriving at a new floor. Before the pylon can be fully activated, players must defeat the enemies that appear on the floor. As the phases progress, the color of the stone's map icon will change, and the perimeter around the pylon will glow when it becomes fully activated.

Resurrection

In addition to resurrection items and actions, players can use a Pylon of Return to raise all KO'd players. These pylons, like the Pylon of Passage, have three phases of activation and can only be used when fully activated. The pylon will be inactive when arriving at a new floor. Players must defeat the enemies that appear on the floor before the pylon can be fully activated. As the phases progress, the color of the pylon's map icon will change, and the pylon itself will glow when it becomes fully activated.

Traps and Floor Effects

As players progress, they will arrive at floors with traps that will be set off when walked across. These traps are invisible unless a player has a special item which can reveal their locations. In addition to traps, some floors have the below effects which may benefit or provide some challenge to the player's ability to progress:

Dread Beasts

As players progress, dread beasts may appear on certain floors. Defeat these powerful monsters to temporarily gain their strength.

Navigation Map 

A special navigation map will be displayed, which can be used to progress through the rooms on a given floor. When any party member enters a room on the floor, the map will automatically update. The icons for the Pylon of Return and the Pylon of Passage will appear in their location on the map.
* Players can display or hide the map by pressing the M key. This is the same key for the Hold button to lock the map in position.
* The default navigational map will not be displayed in Eureka Orthos.

Treasure Coffers

There are three types of treasure coffers which will randomly appear somewhere on the floor at the same time as enemies. While most of these coffers will give players various benefits, some will have traps, such as surprise enemy attacks.

The Accursed Hoard

While exploring Eureka Orthos, players will, on occasion, discover hidden treasure known as the Accursed Hoard. Upon saving progress and exiting Eureka Orthos, players can take this treasure to Valeroine in Mor Dhona (X:34.9 Y:19.1) to have it appraised and discover what lies within.

Uncovering the Accursed Hoard

Players must remain stationary at the location where the treasure is hidden for a fixed period of time for the coffer to be uncovered.

Before the Accursed Hoard can be discovered, players must first use the protomander of intuition to reveal its location on the map.

Locating the Accursed Hoard

While a protomander of intuition is in effect, an icon on the navigation map will indicate the presence of a piece of the Accursed Hoard.

Leaving Eureka Orthos

If all party members are KO'd inside Eureka Orthos, they will be removed from the instance.
* Unlike other dungeons, players cannot choose to return to the floor entrance if they are KO'd.

Players can manage their save data by talking with Khatun located in Mor Dhona (X:34.8 Y:19.2).

Resetting Progress

Players can reset their level and progression to floor 1. However, Orthos aetherpool arm and armor strength will carry over to the new file. This means players can reset and return to floor 1 to continue strengthening their weapons and gear if they have found that previous progression became too difficult.
* Reset save data cannot be recovered.

Disbanding a Fixed Party

Players can convert fixed party saved data to matched party saved data. Orthos aetherpool arm and armor strength will be carried over, but protomander information will be reset. Under these conditions you will be able to be matched with other players who are currently playing on the same floor as you.
* If any members of a fixed party are unable to enter the deep dungeon after the deletion of save data or usage of the Home World transfer service, they must select "Disband your fixed party" to carry over their save data.

The following rewards will be given based on the player's level and progress. 

If your job or class is level 100 upon entering:

Allagan tomestones and gil will be rewarded based on progress.

If your job or class is between levels 81 and 99 upon entering:

Experience points, gil, and Allagan tomestones of poetics will be rewarded based on progress.
* The Armoury bonus will be applied to these rewards.

If you have progressed beyond floor 30:

An Orthos aetherpool fragment will be awarded.
This item can be traded to the synthesis node in Mor Dhona (X:34.9 Y:19.0).

Obtaining and Strengthening Orthos Aetherpool Weapons

If you have strengthened your Orthos aetherpool arm and Orthos aetherpool armor to +10 in addition to clearing the sidequest "Rage Extinguished," you can receive an Orthos aetherpool grip, which can be used to exchange for a weapon of your choosing by speaking with the synthesis node in Mor Dhona (X:34.9 Y:19.0). Please note that by receiving an Orthos aetherpool grip, the strength of your Orthos aetherpool arm and armor used in Eureka Orthos will be reduced by 10.

When challenging certain floors or when the entire party is KO'd, players will receive a score based on a number of factors such as highest floor reached and number of enemies slain. Separate scores for both solo and party play will be assigned after being defeated or clearing certain floors. High scores can be confirmed by speaking with Khatun in Mor Dhona (X:34.8 Y:19.2).
* High scores are only updated for ventures undertaken on your Home World. Ventures undertaken while using the World Visit or Data Center Travel systems will not be counted.

These scores may also appear on the rankings page on the Lodestone. The rankings page will be updated daily, so we encourage you to brave the ever-changing corridors of the dungeon, and prove yourself the realm's greatest pathfinder!