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The Aetherochemical Research Facility

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The Aetherochemical Research Facility

The Aetherochemical Research Facility.png
60 (Sync: 60)
Item Level
142 (Sync: 180)
Party size
Light Party
4 man 1 Tank role.png 1 Healer role.png 2 DPS role.png
Time limit
90 minutes
Duty Finder
Dungeons (Heavensward)
Level 50/60/70/80 Dungeons
Allagan Tomestone of Poetics 150 
Req. quest
Main Scenario quest Heavensward
Azys Lla (X:21.4, Y:22.5, Z:8.7)
Duty Support, Explorer

Your pursuit of the archbishop has brought you to the Aetherochemical Research Facility, at the heart of the floating isle of Azys Lla. However, he and his knights are not the only threat for which you must be prepared; shortly before your arrival, the VIth Imperial Legion entered the facility in search of the secret to mastering primals, and their presence will serve to complicate matters. With multiple factions and their ambitions set on a collision course, your mission promises to be fraught with danger and uncertainty both.

— In-game description

The Aetherochemical Research Facility is a level 60 dungeon introduced in patch 3.0 with Heavensward. With the addition of Duty Support in Patch 6.3, changes to progression and bosses were implemented. It, along with Dungeon Brayflox's Longstop, are the only MSQ dungeons to have 4 bosses instead of 3. This dungeon also does not drop any equipment as loot. To compensate, it rewards a large number of Allagan Tomestone of Poetics Allagan Tomestones of Poetics.

Duty Support

Scion Marauder Scion Conjurer Scion Thaumaturge Scion Lancer
DS Marauder6.png DS Conjurer6.png DS Thaumaturge6.png DS Lancer6.png
Class Marauder frame icon.png Marauder Conjurer frame icon.png Conjurer Thaumaturge frame icon.png Thaumaturge Lancer frame icon.png Lancer
Role Tank Healer DPS DPS


  1. Clear Analysis and Proving
  2. Clear Bioweapons Research
  3. Defeat Harmachis
  4. Defeat all opposition
  5. Defeat Ascian Prime


The Aetherochemical Research Facility Guide (Updated for 6.3)

Aggressive difficulty r5.png Regula van Hydrus

  • Stun icon1.png Stuns a random party member and follows up with untelegraphed AoE on them. Heal as necessary and move away from the stunned player.
  • Summons turrets every phase swap, with one additional turret per swap. Turrets self-destruct if not killed in time, causing room-wide damage.
    • Magitek Turret Is target a random party member with a visible line AoE (Aetherochemical Laser) and will continuously attack them.
    • Magitek Turret IIs target random party members with circle AoEs (Aetherochemical Grenado).
  • The boss will start dashing to the walls and repeatedly cast Magitek Slug, an easily dodged line AoE
  • Defeat the Magitek Turrets to stop the boss from dashing, making him easier to hit.
  • After the second set of adds, the boss will cast Magitek Spread, a telegraphed 270 degree conal AoE.

Aggressive difficulty r5.png Harmachis

  • Weighing of the Heart: Changes Forms, form will be announced but may be only a split second before the change. There is no cast or announcement prior to changing back to Sphinx.
  • Sphinx form
    • Riddle of the Sphinx is an easily dodged circle AoE.
    • Will periodically attack the tank with a untelegraphed conal AoE (Chthonic Hush) that inflicts Poison icon1.png Poison cleansable with Esuna.png  Esuna.
  • Anti-Cobra form
    • Untelegraphed tankbuster (Hood Swing)
  • Anti-Naga form
    • Petrifaction is a telegraphed gaze attack that will cause 10 seconds of Petrification unless you are looking away from the boss.
    • Circle of Flames is an instant AoE that will target multiple party members, stay spread out to avoid stacking damage.
  • Anti-Machina form
    • Ballistic Missile will target a party member with a missile, indicated by a circular "enumeration" marker with a number of rotating spheres over it, indicating how many people should stack to prevent damage. Otherwise, the target player will take high damage.
    • Gaseous Bomb is a stack marker targeting a random player. The entire party should stack.

Aggressive difficulty r6.png Lahabrea & Igeyorhm

As of Patch 6.3, the battle will only end when both Ascians' health are reduced to 0.1% instead of 50%, and both will always be targettable.

  • Shadow Flare: Unavoidable Raidwade damage cast by Lahabrea
  • Fire Sphere: Lahabrea summons five untargettable Burning Stars that will explode in AoE circles after a few seconds.
    • Esoteric Fusion: Another version of this spell will result in two pairs of Burning Stars that are tethered and advance towards each other, which will explode upon contact.
  • Grip of Night: A frontal cone AoE cast by Igeyorhm.
  • Circle of Ice: Igeyorhm summons four Frozen Stars that detonate Donut AoE circles. Stand on the Frozen Stars to avoid damage.
    • Esoteric Fusion: Igeyorhm will tether two of her Frozen Stars together, creating a bigger donut AoE that covers the safe spots in the other Frozen Stars. Players should therefore stand under where the tethered Frozen Stars will detonate to avoid damage.
  • End of Days: Similar to the Towering Oliphant's Rout attack in The Dusk Vigil, this is a line stack marker, which requires players to line up between Lahabrea and the targetted player.
  • Dark Fire II: Lahabrea puts circle purple AoE markers on all players, who should spread to avoid overlapping.
  • If the health difference between the bosses become too large, the higher HP boss will transfer some of its health to the lower HP boss.

Aggressive difficulty r6.png Ascian Prime

The dungeon does not end when Lahabrea and Igeyorhm are defeated. Instead, a notably long but skippable cutscene will show the two merging into the real final boss, Ascian Prime. In addition, failing mechanics will now inflict Vulnerability Up icon1.png Vulnerability Up on players.

  • Shadow Flare: Unavoidable Raidwide Damage.
  • Height of Chaos: Tankbuster
  • Dualstar: Features combinations of the tethered Burning Stars and Frozen Stars from the previous battle. Ascian Prime will then cast Fusion Prime to make them collide. If non-tanks are hit by two AoEs at once, they will likely die. To tell the order of the collisions and their AoEs, players must eye the distance of the tethers and the colors of the orbs instead of relying on the orange AoE indicators, which only briefly appears before the AoEs resolve.
    • If the Frozen Stars collide first, stand under them and quickly run away from the imminent detonation of the Burning Stars
    • If the Burning Stars collide first, run away from them and then quickly run under the Frozen Stars before they detonate as well.
    • Using Sprint icon1.png  Sprint is recommended.
  • Universal Manipulation: Causes room-wide damage and five debuffs. As of Patch 6.3, there no portals to hide in and avoid this, and the debuffs will detonate the following mechanics:
    • Bleed icon1.png Bleeding: Players take damage overtime until the debuff expires.
    • Ancient circle icon1.png Ancient Circle: Upon expiring, this creates a massive donut AoE around each player. They should stack in the center to ensure the donut AoEs do not spread there.
    • Dark whispers icon1.png Dark Whispers: Upon expiring, this creates a purple AoE circle on each player, who should spread out to avoid overlapping.
    • Ancient frost icon1.png Ancient Frost: Upon expiring, the afflicted player will find themselves the victim of a stack marker.
    • Burning chains icon2.png Burning Chains: Upon expiring, players are chained by pairs and must run away from each other to break them.
  • Entropic Flame: A line stack marker.
  • Arcane Revelation: A reprisal of Lahabrea's ultimate from Main Scenario QuestThe Ultimate Weapon. Ascian Prime becomes untargettable, summons a large Arcane Sphere, and begins siphoning power from it to fill an Ascian Prime's Power gauge. Meanwhile, untargettable Shades of Lahabrea and Igeyorhm periodically appear to unleash mechanics on the party
    • Chilling Cross and Dark Fire II: Igeyorhm's shade creates cross line AoEs from the middle of the arena while Lahabrea's shade places purple AoE circles on players.
    • Dark Blizzard II and Dark Fire II: Igeyorhm's shade creates several frozen line AoEs while Lahabrea's shade places purple AoE circles on players.
    • Shadow Flare: Both Shades cast this at the same time, dealing extra raidwide damage.
    • Annihilation: Heavy raid-wide damage based on how far the Ascian Prime's Power gauge filled. If Ascian Prime was allowed to reach 100%, his attack will wipe the party
  • Ancient Eruption: Ascian Prime causes AoE circles to appear underneath each player.

From there, the mechanics repeat themselves until the boss is defeated.


Silver Coffer (small).png Regula van Hydrus

Silver Coffer (small).png Harmachis

Silver Coffer (small).png Lahabrea & Igeyorhm

Gold Coffer (small).png Ascian Prime

Name Type Item Level Rarity Quantity
Faded copy of imagination icon1.png  Faded Copy of Imagination   This item is guaranteed to drop. Orchestrion Roll N/A ABasic 1


This duty is associated with the following achievements:

Name Points Task Reward Patch
Mapping the realm aetherochemical research facility icon1.png  Mapping the Realm: Aetherochemical Research Facility 10 Discover every location in the Aetherochemical Research Facility. - 3.0


Dungeon Images

Other Images


The Study Of Eikons

The ancient Allagan civilization rose to greatness through the blessings of aetherochemistry, and in order to advance this field of science born of the union between magic and technology, they built the Aetherochemical Research Facility. Originally situated near present-day Mor Dhona, it was relocated to Azys Lla towards the end of the Third Astral Era. Information recently deciphered from tomestones revealed that the move came about with the commencement of research into eikon suppression. Following debate over ways to protect the facility’s secrets, isolation was settled upon as the best solution

As would be confirmed millennia later with Azys Lla’s discovery, the Allagans' efforts bore fruit. In addition to sectors dedicated to automachina and bioweapon research, the facility housed what was called Triad Control, which served to restrain and imprison actual eikons. Covetous of this power, the Garlean Empire dispatched the VIth Imperial Legion and its flagship, the Gratio, to the floating continent that it might avail itself of the ancients' secrets.

Regula van Hydrus

Legatus of the VIth Imperial Legion, Regula has long been a close friend of Emperor Varis, and his loyalty to his liege is absolute. In return, Varis has absolute trust in Regula, and thus did he charge him with leading the expedition to retrieve the secrets of eikon suppression on Azys Lla.

Ascian Prime

Calling upon the power of the Echo to break down the barriers of their souls, the Ascians Lahabrea and Igeyorhm merged into a single entity. As one, they proved far more formidable than the sum of their individual forms, and were capable of wielding the mightiest magicks with fearsome ease. Thus freed from their mortal restraints, they assumed a ghastly appearance befitting the servants of Darkness.


Even after five thousand years, many parts of the facility were miraculously found tobe fully functional. The Sons of Saint Coinach posit that the Allagans likely employed temporal magicks, which they studied in the twilight of the Third Astral Era, to place certain contraptions into stasis.