The Forbidden Land, Eureka Hydatos
- See also: The Forbidden Land, Eureka and The Baldesion Arsenal
“Having conquered the burning landscape of Pyros, the expedition pushes onward to a region ruled by water: Hydatos. Here rises the headquarters of the Students of Baldesion, their final destination, but aetheric anomalies and fearsome creatures conspire to ensure that entry will not be easily gained. Yet gain entry to the tower they must if they are to head off the threat of the primal Eureka and lay the isle's mysteries to rest once and for all...
— In-game description
The Forbidden Land, Eureka Hydatos is a level 70 adventuring foray introduced in patch 4.55 with Stormblood.
It is the final area in The Forbidden Land, Eureka. The zone is primarily water-aspected, containing several geysers and shallow rivers in much more open layout compared to previous Eureka zones.
Requirements
- Level Requirement: Disciple of War or Magic level 70
- Item Level Sync: 300
- Elemental Level Cap: 60
- Party Size: One to eight players
- While up to 144 players can simultaneously be in the instance, only party sizes of up to eight players are allowed. Players can freely join or leave parties inside the instance, but Party Finder is disabled.
- Role Restrictions: None
- Time Limit: 180 minutes
- The instance timer is specific to each player and commences upon entering the duty.
- Unrestricted Parties not allowed
Unlock
Complete the quest And We Shall Call It Hydatos
- Level: Disciple of War or Magic level 70
- Starting NPC: Rodney
- Starting NPC Location: Kugane (X:8.5 Y:14.2)
- Players must first complete the story of The Forbidden Land, Eureka Pyros.
Shops & Services
| Merchant Name | Merchant Location |
|---|---|
 |
(X:20.5, Y:13.3) |
|
(X:19.8, Y:13.9) |
|
(X:21, Y:13.7) |
|
(X:21.4, Y:13.6) |
Eureka Hydatos FATEs
Logos Actions
One additional logogram and six new logos actions have been added.
List of Logograms
Logograms are items that can be appraised to obtain mnemes in The Forbidden Land, Eureka content. When appraised by Drake, who is located next to the Logos Manipulator in Pyros and Hydatos, the logogram will turn into one random mneme from a pool that depends on the logogram. Mnemes can then be combined to give Logos Actions at a Logos Manipulator. Logograms may be obtained as enemy drops, from lockboxes, or as direct rewards from Notorious Monsters, and may also be traded with other players or purchased from the Market Board.
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Eureka Weapons
After fully augmenting a Eureka weapon in The Forbidden Land, Eureka Pyros and proceeding to a certain point in the Hydatos story, you will be able to augment your Eureka weapon further by speaking to Gerolt in The Forbidden Land, Eureka Hydatos (X:21.4 Y:13.6).
An upgrade to Pyros weapons. Weapons will have a new model and swirling particle effects. This step grants the weapon's final appearance and maxes out its stats, excluding elemental stats that are effective in Eureka zones only. If you only care about the earning the glamour and don't care about the elemental stats, you can stop after completing this step.
| Item Quick Reference | Total for every weapon | ||||
|---|---|---|---|---|---|
|
|
| Eureka Weapons (IL 405) |
|---|
| Weapon Tier | IL | Items needed |
|---|---|---|
| Hydatos | 390 |  x50
|
| Hydatos +1 | 395 | x100
|
| Base Eureka | 400 | x100
|
| Eureka | 405 | x100,  x5
|
How to acquire items to upgrade
Hydatos Crystal: These are acquired by killing Notorious Monsters in Eureka Hydatos. The higher level the Notorious Monster, the more crystals it will drop. While fewer crystals are needed compared to prior steps, Notorious Monsters in Hydatos also drop fewer crystals. A good source of crystals is the FATE 
The Baldesion Arsenal: Expedition Support, although this only spawns when there is an ongoing run of 
The Baldesion Arsenal.
Crystalline Scale: 3 scales will drop each time you complete the FATE Crystalline Provenance with gold medal credit in Eureka Hydatos, which requires you to kill the notorious monster Provenance Watcher. This is the only way to obtain the item as they are not sold by the Expedition Birdwatcher.
Physeos Weapons
An upgrade to Eureka weapons. Stats and appearances are identical to Eureka weapons, except that they have extra Elemental Bonus stats that increase the weapons' power in Eureka zones only (including The Baldesion Arsenal).
| Item Quick Reference | Total for every weapon | ||
|---|---|---|---|
|
|
| Physeos Weapons (IL 405) |
|---|
| Weapon Tier | IL | Items needed |
|---|---|---|
| Physeos | 405 |  x100
|
How to acquire items to upgrade
Eureka Fragment: These are exclusively acquired inside The Baldesion Arsenal. A complete clear yields 28 fragments total, with each boss defeated dropping a portion of that total amount. It requires a total of four runs, assuming all of them are successful, to obtain enough fragments for one weapon.
Elemental Armor Sets
Eureka armor augmentation will be unlocked once 56 unique logos actions are registered in your log.
Other Rewards
Happy Bunnies
Hydatos is also home to many a happy bunny. As a reward for saving them from imminent peril, happy bunnies will help you find hidden treasure on the island.
Bronze
10,000 gil
Inimical Logogram
Protective Logogram
Curative Logogram
Savage Aim Materia V
Savage Might Materia V
Heavens' Eye Materia V
Quickarm Materia V
Quicktongue Materia V
Battledance Materia V
Piety Materia V
Savage Aim Materia VI
Savage Might Materia VI
Heavens' Eye Materia VI
Quickarm Materia VI
Quicktongue Materia VI
Battledance Materia VI
Piety Materia VI
Silver
- 25,000 gil
Aethertight Flask
Aetherially Conductive Plate
Happy Bunny Card
Mitigative Logogram- Inimical Logogram
- Savage Aim Materia V
- Savage Might Materia V
- Heavens' Eye Materia V
- Quickarm Materia V
- Quicktongue Materia V
- Battledance Materia V
- Piety Materia V
- Savage Aim Materia VI
- Savage Might Materia VI
- Heavens' Eye Materia VI
- Quickarm Materia VI
- Quicktongue Materia VI
- Battledance Materia VI
- Piety Materia VI
Gold
- 100,000 gil
Penthesilea's Spear- Aetherially Conductive Plate
Eurekan Petrel Horn (
Eurekan Petrel)
Absolute Lance
Offensive Logogram- Savage Aim Materia V
- Savage Might Materia V
- Heavens' Eye Materia V
- Quickarm Materia V
- Quicktongue Materia V
- Battledance Materia V
- Piety Materia V
- Savage Aim Materia VI
- Savage Might Materia VI
- Heavens' Eye Materia VI
- Quickarm Materia VI
- Quicktongue Materia VI
- Battledance Materia VI
- Piety Materia VI
Notorious Monsters
Players may encounter notorious monsters that cannot be found in other regions of Eureka. Those who would engage them are advised to seek aid from other adventurers.
Defeating notorious monsters yields a great deal of elemental EXP, as well as various rewards.
The Baldesion Arsenal
The Baldesion Arsenal is a brutally difficult open dungeon that can be challenged by up to 56 players at once. To enter, you will need to complete the main Eureka storyline and prepare for the worst.
The entry requirements for this duty are extremely strict, as savage bosses, devious traps, and an effect that prevents resurrection by certain means all await you within.
Those who hope to challenge this dungeon should read all available information thoroughly, and properly understand the risks before entering.
Entering the Baldesion Arsenal
Aetherial nodes throughout Hydatos can provide access to the Baldesion Arsenal.
To make use of these nodes, your elemental level must be 60. You will also require a particular status enhancement.
Aetherial Nodes
There are two varieties of aetherial nodes: unstable blue nodes, and stable red nodes. Regardless of type, each node will disappear once accessed by a player, or if a certain amount of time passes without its being accessed.
- Only the player who accesses a node will be transported, even if that player is in a party at the time.
The appearance of aetherial nodes is related to the atmospheric condition umbral turbulence.
Unstable Aetherial Nodes
An Aetheric Stabilizer is required to use unstable nodes. Aetheric Stabilizers can be acquired in Hydatos through various means, and will be consumed once they are used to access a node.
Stable Aetherial Nodes
Stable nodes do not require the use of Aetheric Stabilizers. However, each will only appear after a certain amount of time has passed following the disappearance of an unstable node.
Resurrection Restrictions
The detrimental status effect 
"Resurrection Restricted" will be applied upon entering the Baldesion Arsenal. While this status is active, you can only be resurrected via 
Limit Break or with 
Sacrifice L. For this reason, be aware that KO carries a heavy risk.
Withdrawal and Re-entry
If you use choose the Return function from the menu, or accept the prompt to return to the starting point while KO'd in the Baldesion Arsenal, you will be removed from the dungeon and transported to the expedition camp in Eureka Hydatos. To re-enter the dungeon, you will once again need to access an aetherial node, so think carefully before returning.
Rewards
- Main article: The Baldesion Arsenal#Loot
Those who defeat the bosses within and clear the entirety of the Baldesion Arsenal will be richly rewarded. To do so will be no mean feat, however─you must communicate well with your fellow adventurers if any of you are to reach the prize.
Achievements
This duty is associated with the following achievements:
| Name | Points | Task | Reward | Patch |
|---|---|---|---|---|
 Mapping the Realm: Eureka Hydatos
|
10 | Discover every location within the Forbidden Land, Eureka Hydatos. | - | 4.55 |
 Making the Most of Hydatos
|
10 | Complete all the story objectives within the Forbidden Land, Eureka Hydatos. |  Eurekan Explorer
|
4.55 |
 Really Making the Most of Hydatos
|
0 | Truly complete all the story objectives within the Forbidden Land, Eureka Hydatos. | - | 4.55 |
Images
Map
Detailed Map
Trivia
- Hydatos means not merely water, but the living water, such as from rainfall or rivers.