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The Lost City of Amdapor is an optional level 50 dungeon in Final Fantasy 14. In the years since the fall of the Amdapori, the magic seal of the Lost City has weakened, and the evil force it held back threatens to break free. Naturally, it's up to you to find the horror that was held behind the seal, and kill it.

Related: Final Fantasy 14: Amdapor Keep Dungeon Guide

As you make your way through the plagued courtyards of the Lost City of Amdapor, try not to inhale too much of the pustules and pollen. Let's take a look at each of the bosses inside the Lost City of Amdapor, their attacks and mechanics, and how to beat them.

How To Unlock The Lost City Of Amdapor

This dungeon is unclocked by accepting the following side quest.

  • Accept the quest 'One Night in Amdapor'
    • NPC Location: E-Sumi-Yan - Old Gridania (X:6.0, Y:10.7)

This quest will only appear after you have reached level 50 and completed the Main Scenario Quest 'The Ultimate Weapon'.

Dungeon Walkthrough

In the first section of this dungeon, Mold Colonies will summon additional enemies and Tainted Mold, which will explode when coming into contact with a player, unleashing a blast of Poison. Used ranged attacks to destroy the Mold, then focus on destroying the Mold Colony first to prevent it from creating more enemies.

Throughout the dungeon, you will come across two chests side-by-side. One of these is a Mimic, which will attack when opened. Choose carefully or prepare to deal with the Mimic when opening the chests.

After defeating the second boss, you will encounter Baalzephon enemies that are tethered to White Magestones. The White Magestones grant the Baalzephon a stacking Regen buff, which will continuously restore its health. Destroy the stones before focusing on the Baalzephon, then kill the rest of the nearby enemies to create a path to the next area.

Decaying Gourmand

The first boss of the Lost City of Amdapor is the Decaying Gourmand. This boss will apply a variety of debuffs with its attacks, which are outlined below.

  • Beatdown: The Decaying Gourmand will deal damage and knockback in an area to its front. Move accordingly to avoid being knocked into other hazards.
  • Moldy Phlegm: The Decaying Gourmand will create puddles of Pollen, which deal damage over time. Avoid moving in these or being knocked into them from Beatdown.
  • Devour: Throughout the fight, the Decaying Gourmand will mark a player as its Prey. Then, after a few seconds, the Decaying Gourmand will pull the marked player into its Voracious Jaw, trapping them inside. The trapped player will take continuous damage, and will eventually be instantly killed. To save them, the other players must destroy the Voracious Jaw quickly.

The Decaying Gourmand will repeat these attacks until it is defeated. Be sure to help the trapped party member to avoid their death by destroying the Voracious Jaw as quickly as possible.

Arioch

The second boss of the Lost City of Amdapor is Arioch. When you enter the arena, a single Ranch Wamoura will be wandering around, while Arioch flies above, untargetable. Killing the Wamoura will cause it to unleash a cloud of Scale Flakes to its front, applying a debuff of the same name. Players with this debuff will take increased damage, and the boss will target the player with the highest stacks. To keep the boss from flying away and regaining health, be sure to reapply Scale Flakes by killing the additional Ranch Wamoura that appear throughout the fight.

  • Stormwind: Arioch will deal damage in a cone to its front. The Tank should face the boss away from the rest of the party to avoid hitting them with this attack.
  • Eerie Soundwave: Arioch will deal damage to all party members. Recover the party's health with AoE healing.
  • Pollen: Arioch will create a puddle of Pollen that deals damage over time. Avoid standing in this puddle while it persists.
  • Corrosive Gale: Arioch will deal damage in a line AoE to its front, inflicting Reduced Immunity. This debuff will reduce the effectiveness of healing on the debuffed player. Move outside the AoE indicator to avoid this attack.
  • Plague Swipe: Arioch will deal damage in a cone-shaped AoE to its back, inflicting Poison. The boss will only use this attack when players are standing behind it. Quickly move out of the AoE indicator to avoid taking damage and getting poisoned.

Arioch will repeat these attacks until it is defeated. The Tank should be sure to maintain the Scale Flakes debuff, while other players avoid getting hit with it to prevent taking increased damage. Be careful not to kill too many Ranch Wamoura at once, however, as this can cause you to take too much damage from Arioch's attacks.

Diabolos

The final boss of the Lost City of Amdapor is Diabolos. When you engage Diabolos, eight Diabolical Gates will appear around the arena, each with a red, blue, light green, or dark green symbol. The symbol will only be visible for a short duration at the beginning of the fight. Until Diabolos starts casting Ruinous Omen later in the fight, don't interact with the Diabolical Gates.

The rest of Diabolos's attacks and mechanics are detailed below.

  • Nightmare: Diabolos will deal damage to all party members and inflict Nightmare, making you unable to move or attack.
  • Ultimate Terror: Diabolos will deal damage in a ring-shaped AoE around himself. Either move far away from the boss or close to him to avoid taking damage.
  • Graviball: Diabolos will target a random player before unleashing a Gravity Orb at them. The Orb will remain where it lands, periodically unleashing Critical Gravity, dealing damage in an area around the Orb and inflicting Heavy. The targeted player should move to position the Orb away from the rest of the party.
  • Night Terror: Diabolos will deal damage in a circular AoE. Move outside the AoE indicator to avoid getting hit.
  • Diabolical Curse: Diabolos will apply this debuff with some of his attacks. Diabolical Curse will increase your damage taken, stacking up to eight times.
  • Noctoshield: Diabolos will grant himself the Noctoshield buff, increasing his resistance to stun effects.
  • Ruinous Omen: This long-casted attack will deal high damage to all players and inflict multiple stacks of Diabolical Curse. To avoid it, you'll need to open two Diabolical Gates with paired symbols to create a Void gate, which will allow you to become Voidbound and immune to damage. Opening two doors with different symbols will inflict a stack of Diabolical Curse, so choose carefully.
    • Work with your party to determine which two doors have the same symbol, then quickly open them and step inside to become immune to damage and avoid Ruinous Omen. Successfully opening a pair of doors will cause them to disappear after they've been used, reducing the number of choices for the next Ruinous Omen.

Diabolos will repeat these mechanics until he is defeated. This is a healing-intensive fight, so make sure the Healer is consistently restoring the party's health. Do your best to avoid mechanics to make the load on the Healer easier.

The best way to remember which doors to open for Ruinous Omen is to simply find and pick two matching ones at the beginning of the fight, and remember their position. Then, when Diabolos casts Ruinous Omen, quickly run to and open the doors you chose earlier.

After Diabolos is defeated, the Lost City of Amdapor will be complete. Don't forget to collect your loot on the way out.

Next: Final Fantasy 14: Complete Guide