The Baldesion Arsenal

What is the Baldesion Arsenal?

The Baldesion Arsenal (BA) is a 56-man combat instance that takes place inside Hydatos. It is an unforgiving place, where raising is limited, and every hit could be fatal. It scales down to 24 players, so it's possible to do with less than 56 players.

6.x patch state of BA: Despite not having echo added to this date, BA is significantly easier compared to how it was in 4.x and 5.x patches, due to various job changes and gear differences. It's still punishing in terms of raising, but DPS checks are significantly easier to achieve.

Entrance to the Baldesion Arsenal

Entrance into the Baldesion Arsenal can happen after getting the buff from Ovni fate (buff called Aetherially Primed). To get the buff, you need to have:

Hydatos questline finished,
be elemental level 60 and
get the gold rating from the FATE.

3 minutes after Ovni's death, 48 blue portals will spawn around pre-determined positions on the map.

Aetherial Nodes

Unstable Aetheric Nodes (Blue Portals): These cannot be entered without having an Aetheric Stabilizer in your inventory. Usually, it's NOT recommended to use the stabilizers to enter Baldesion Arsenal on Eurekan Academy runs, so don't bother making one.
Stable Aetheric Nodes (Red Portals): 3 minutes after that, the blue portals will disappear, and red, stabilised portals will appear in the same predetermined positions. These do not require an Aetheric Stabilizer, and these are usually used for groups to enter BA for free.

Later, when the Support fate is spawned and killed, the same process will happen, but with only 8 portals instead, joining the last group to the main expedition force, and bringing the total number of people to 56.

For runs with the Eurekan Academy, we do not use Aetheric Stabilizers to enter blue portals unless the run itself dictates that we do. For Support portals, ask the party lead for Support if it's okay to use an Aetheric Stabilizer, and go from there.

Preparation and Logos Actions

Inside Baldesion Arsenal, players cannot be raised by normal means. There are only 3 ways to be resurrected inside:

Logos action Spirit of the Remembered, which provides 70% chance of auto-revival upon KO
Healer logos action Sacrifice L, giving the healer who used it an uncleansable Doom debuff, causing them to die
Healer Limit Break 3

As such, it is important to always have a Spirit of the Remembered active. Moreover there will be traps inside, which can only be revealed by logos action Perception L, and last two bosses will require usage of offensive logos actions to be able to meet the DPS checks. Prepare your Spirit of the Remembered and an offensive Wisdom for your role beforehand.

For what logos actions to use, check Newbie Logos Actions Guide and Advanced Logos Actions Guide.

For gear, Kirin's Osode (Tanks, Melee, Physical Ranged) or Vermillion Cloak (Healers, Casters) is very useful for your first run, if you don't have them you should just use the best gear you have available. For more explanation about gearing and optimisation check the BA Gearing Guide.

Eureka's Weapons (Bosses)

Few specific mechanics inside Baldesion Arsenal will give you stacks of Mark of Mortality if handled incorrectly. A stack of Mark of Mortality reduces damage dealt for 3 minutes. 3 stacks of Mark of Mortality will result in death.

What is Ozma's room called again?

The answer is Proto-Ozma Containment Unit.

Trash Mobs Encountered in the Arsenal

Before starting, there are no positionals inside The Baldesion Arsenal, so you can safely ignore positional requirements for your combos.

**Trash Mobs inside the Baldesion Arsenal**
Level	Name	Element	Mechanics
65	Arsenal Demon Wall	Earth	Magical auto attacks
65	Arsenal Magus	Earth	Starstorm: Random targeted ground AoE
65	Arsenal Viking	Ice	Raging Axe: Dodgeable random targeted frontal AoE
65	Arsenal Eye	Wind	Dread Gaze: Frontal AoE that inflicts Hysteria debuff which makes people that got hit walk randomly
65	Arsenal Fan	Wind	Tight Tornado: Stunnable line AoE. Will give a DoT that should be Esuna'd if got hit Ancient Aero III: Raidwide that also does a knockback
65	Arsenal Scribe	Wind	Condensed Libra: Interruptable cast that will buff the mob and give a random player Enervation debuff that will decrease damage dealt and increase damage taken
65	Arsenal Brina	Fire	Heat Gaze: Donut AoE
65	Arsenal Skatene	Wind	Chirp: Random targeted ground AoE that will sleep anyone inside it. Esuna if got hit
65	Arsenal Vodoriga	Lightning	Terror Eye: Random targeted ground AoE
65	Arsenal Calca	Water	Heat Gaze: Huge conal AoE
65	Arsenal Tome	Ice	Paralyze: Interruptable cast that will paralyze a random person Silence: Interruptable cast that will silence a random person
66	Arsenal Poroggo	Water	Toy Hammer: Tankbuster that will hit 80% of tank's HP. Reflectable. Flood: Ground AoE under Poroggo Water III: Random targeted point blank AoE
66	Arsenal Byblos	Earth	Page Tear: Frontal cleave tankbuster. Not telegraphed Magic Hammer: Stunnable random targeted point blank AoE. Survivors will lose half of their mana Tail Smash: Baited behind cleave
66	Arsenal Centaur	Lightning	Berserk: Will give the mob a damage up buff. Should be slept immediately. Can also be dispelled by Dispel L Rear: Ground point blank AoE originating from the mob
66	Arsenal Sprite	Ice	Banish III: Interruptable cast that will hit multiple random people. Removes a beneficial effect from players
66	Arsenal Geshunpest	Fire	Dark: Interruptable/stunnable conal AoE
66	Arsenal Calcabrina	Ice	Terrifying Glance: Frontal cleave that will confuse anyone that got hit Slapstick: Two back to back raidwides
66	Arsenal Bibliotaph	Earth	Magic Burst: Point blank AoE under the mob that also gives magic vulnerability Deep Darkness: Donut AoE from the mob that also gives a Slow Debuff
66	Arsenal Logos	Lightning	Iron's Justice: Frontal conal AoE Cloudcover: Point blank AoE under the mob
66	Arsenal Strix	Ice	On the Properties of Darkness: A stunnable/sleepable cast that will cleanse the players off of any buff, including Spirit of the Remembered

Some of these attacks are reflectable. Check the Baldesion Arsenal section of Reflect L if curious.

Special Aggro Types inside Baldesion Arsenal

Inside Baldesion Arsenal, just like Eureka in general, there are enemies with special aggro types. The aggro types can be summarised as follows:

Touch aggro: Enemy will attack upon hit/collision
Sound aggro: Enemy will attack upon sound (running)
Sight aggro: Enemy will attack upon frontal detection*
Blood aggro: Enemy will attack upon low HP (ashkins)
Cast aggro: Enemy will attack upon spell cast (sprites)

All enemies inside Baldesion Arsenal are touch aggro. Besides touch aggro these specific enemies have an additional aggro type:

Enemy	Aggro Type
Arsenal Tome	Sound
Arsenal Sprite	Cast
Arsenal Geshunpest	Blood
Arsenal Logos	Blood
Remaining Enemies*	Sight

*Enemies inside Baldesion Arsenal have stealth detection. Even if you go in front of them stealthed (Ninja or Stealth L), they will still aggro (True Sight aggro).

Trash Mob Enfeeblement Chart

Before starting, each mob still preserves their elemental property gained from Pyros onwards. Aside from elemental properties, each mob have specific status conditions that can be applied to them, outlined below.

Enemy	Element	Stun	Sleep	Slow	Heavy	Bind	Paralysis
Arsenal Demon Wall	Earth	✓	✓	X	X	✓	✓
Arsenal Magus	Earth	✓	✓	X	X	✓	✓
Arsenal Viking	Ice	✓	✓	✓	✓	✓	✓
Arsenal Eye	Wind	✓	✓	X	✓	X	✓
Arsenal Fan	Wind	✓	✓	✓	✓	X	✓
Arsenal Scribe	Wind	✓	✓	✓	✓	✓	✓
Arsenal Brina	Fire	✓	✓	✓	X	✓	✓
Arsenal Skatene	Wind	✓	✓	✓	✓	✓	✓
Arsenal Vodoriga	Lightning	✓	✓	✓	✓	X	X
Arsenal Calca	Water	X	✓	✓	✓	✓	✓
Arsenal Tome	Ice	✓	✓	X	X	✓	✓
Arsenal Poroggo	Water	X	✓	✓	✓	✓	✓
Arsenal Byblos	Earth	✓	✓	X	X	✓	✓
Arsenal Centaur	Lightning	X	✓	✓	✓	✓	X
Arsenal Sprite	Ice	✓	✓	X	✓	X	✓
Arsenal Geshunpest	Fire	✓	X	✓	✓	✓	✓
Arsenal Calcabrina	Ice	X	✓	✓	✓	✓	✓
Arsenal Bibliotaph	Earth	X	✓	X	X	✓	✓
Arsenal Logos	Lightning	✓	X	✓	✓	✓	X
Arsenal Strix	Ice	✓	✓	✓	✓	X	✓

Aside from enfeeblements, Death L doesn't work on Arsenal Geshunpest, Arsenal Logos and Arsenal Sprite. Works on every other trash mob. Banish works on Arsenal Geshunpest and Arsenal Logos (ashkin mobs).

Guides for special duties inside The Baldesion Arsenal

Loot from Baldesion Arsenal

Source	Loot
Art & Owain	3 Eureka Fragments 1 Damascene Cloth (rare) 1 Cryptic Seal (rare)
Raiden	6 Eureka Fragments 1 Damascene Cloth (rare) 1 Cryptic Seal (rare) 1 Shin-Zantetsuken (rare) 1 Great Shin-Zantetsuken (rare)
Hallway & Rooms	1 Eureka Fragment 5 Obscure Logograms 1 Damascene Cloth (rare) 1 Cryptic Seal (rare)
Absolute Virtue	6 Eureka Fragments 1 Damascene Cloth (rare) 1 Cryptic Seal (rare) 1 Conditional Virtue (minion) (rare)
Proto-Ozma	10 Eureka Fragments 1 Damascene Cloth 1 Cryptic Seal 1 Turmoil Orchestrion Roll

Lore

Leather-bound Journal 1

We have taken into our safekeeping twin spears of Eureka's forging─Orlasrach, the black, and Munderg, the white. Though physically separate, the weapons are aetherically linked, and are a single entity in all but form.

Leather-bound Journal 2

When brought together, the power of one amplifies that of the other, and even should they be isolated, if one comes under threat, its counterpart will immediately teleport to its aid.

Leather-bound Journal 3

It cannot be stressed enough that these spears are a single entity. So long as one persists, the other will regenerate and return from apparent destruction. If they are to be eliminated permanently, they must be struck down at the exact same moment.

These tomes give a hint to pull first bosses Art & Owain at the same time. If only one twin is engaged (e.g. one side wipes or only one boss is pulled), bosses will teleport to aid other twin, become untargetable and cast their enrage, wiping the raid.