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Castrum Meridianum Dungeon Guide

Last Updated: February 27th, 2014 [ Patch 2.1 ]
Castrum Meridianum
Overview & Summary
Castrum Meridianum Dungeon Guide

Dungeon Info

Level Location Size Time Limit
50 Northern Thanalan 8 Players 120 Minutes

In order to enter Castrum Meridianum, reach level 50 and progress the main storyline up to the quest "Rock the Castrum."

Castrum Meridianum is a story-driven dungeon with frequent cutscenes. It is also only the second 8-man dungeon in the storyline, so the fights will stay fairly simple to ease you into the larger group content.

Clearing this dungeon will reward 100 Allagan Tomestones of Philosophy.

Trash

  • At the start, only pull the guards near the terminals. Once the terminals are shut off, the remainder of the guards will run.
  • Avoid Magitek Cannon from Magitek Reapers, Drill Cannon from Magitek Vanguards, and Exhaust from Magitek Colossus. Also, face them all away from the group.
  • Additionally, avoid the search lights.

The Black Eft

  • Face the boss away from the group and tank near one of the doors.
  • The 2nd tank should pick up the adds from the far door when they spawn.
  • Make sure you avoid Magitek Cannon, which is targeted on a random player.

Magitek Vanguard F-I

  • One tank should face the boss away from the group while the other tank picks up all the adds.
  • Everyone should avoid Drill Cannons and Overcharge and, when the Reaper is alive, Magitek Cannon.

Magitek Colossus Rubricatus

  • Face the boss away from the group.
  • Spread out and avoid Exhaust, a frontal column.
  • Pile the adds into a cluster for AoE. The Magitek Vanguard can either be killed or off-tanked and ignored.

The Final Boss - Round 1

  • Pickup and kill the adds quickly to defend the cannons.
  • Load the cannons by clicking on the Magitek Missle piles. Once loaded, let the current offtank click the cannon to blast the boss for 3000 damage. This will trigger a tank swap.
  • Everyone should avoid Magitek Cannon, the circular AoE.

The Final Boss - Round 2

  • Move out of Stunning Sweep, which will deal 1000 damage and inflict paralysis.
  • Avoid Angry Salamander, a frontal columm attack.
  • The tank can run behind the boss during Aglaia Climb to interrupt the cast.
  • At 75% and 50%, have the offtank pick up all the adds and AoE them down.
  • At 25%, a Magitek Colossus will spawn. Stay behind it, spread out, and avoid Exhaust.
The Black Eft
Boss Guide
The Black Eft Boss Guide - Castrum Meridianum

Boss Abilities:

The Black Eft's Abilities:

  • Photon Stream - (Instant) A frontal barrage of bullets, dealing ~400-600 damage. This is The Black Eft's primary attack.
  • Magitek Cannon - A large cicular AoE targeted on a random player which deals ~2300 damage.

8th Cohort Laquearius's Abilities:

  • Overpower - A frontal cone which deals ~1000 damage.

Imperial War Hound's Abilities:

  • Sanguine Bite - A frontal column which deals damage.
  • Foul Bite - (Instant) A melee strike which deals ~200 damage.

Imperial Signifer's Abilities:

  • Thunder - A spellcast which deals ~100 damage.
  • Dark Blizzard - A spellcast which deals ~300 damage in a circle.
  • Dark Fire - A spellcast which deals ~300 damage in an AoE around the target.

The only ability in this encounter that can even dent your health pool will be Magitek Cannon. As long as you move out of the ground indicator for it, this fight is will be very easy. As with most bosses, face this one away from the group.

Occasionally, four adds will spawn, two in front of each door. You can tank the boss in front of one of the doors so that the adds on that side are picked up immediately. The off-tank should run to the other door and grab those.

Sabotaging the Pumps
Trash Guide
Sabotaging the Pumps - Castrum Merdianum

With the boss dead, jump into one of the Disposal Chutes to proceed. Here, you will fight Magitek Reapers, who use the same ability as the first boss, Magitek Cannon. You will also fight Magitek Vanguards, which use Drill Cannon, a frontal column. Make sure you disable the Searchlight Terminal to send a group of Magitek Armor running.

You will also encounter search lights in this area. If you get caught in one, you will spawn two Magitek Death Claws. While these are easy to dispatch, you should try to avoid getting caught.

Before fighting the next boss, run down the hill to the Pump Station. Here, you will find two Unstable Panels. Plant explosives on both and head back to the boss.

Magitek Vanguard F-I
Boss Guide
Magitek Vanguard F-I Boss Guide - Castrum Merdianum

Boss Abilities:

Magitek Vanguard F-I's Abilities:

  • Cermet Drill - (Instant) A frontal attack which deals ~1200 damage.
  • Drill Cannons - A frontal column which deals ~1800 damage.
  • Overcharge - A frontal cone which deals ~1500 damage and inflicts paralysis.

8th Cohort Signifer's Abilities:

  • Dark Fire - A spellcast which explodes a ball of fire, dealing damage to anyone in the ground indicator.

8th Cohort Sagittarius's Abilities:

  • Venomous Bite - (Instant) A melee strike which deals ~300 damage and inflicts Venomous Bite (DoT).
  • Windbite - (Instant) A melee strike which deals ~200 damage and inflicts Windbite (DoT).

Magitek Reaper's Abilities:

  • Photon Stream - (Instant) A frontal barrage of bullets, dealing ~400-600 damage.
  • Magitek Cannon - A large cicular AoE targeted on a random player which deals ~2300 damage.

This boss is very similar to the first boss. The vanguard should be faced away from the group, with the tank dodging Drill Cannons and Overcharge. The adds will spawn in front of all three doors, so tank in front of one of the doors, with the offtank grabbing the adds from the other two doors. The Magitek Reaper that spawns near the end of the fight can be off-tanked and ignored by the DPS.

Destroying the 2nd Generator
Trash Guide
Destroying the 2nd Generator - Castrum Merdianum

Grab the imperial identification key dropped from the Magitek Vanguard and head north, where Cid will blast a hole in the door. Here you will find another Searchlight Terminal, more Magitek Armor, and a new type of enemy, a Magitek Colossus. These use Grand Sword, a large frontal slash, and should be faced away from the group. They also use Exhaust, a frontal column for everyone to dodge.

Once you reach the generators, Cid will start working to destroy them, which spawns the next boss, Magitek Colossus Rubricatus

Magitek Colossus Rubricatus
Boss Guide
Magitek Colossus Rubricatus Boss Guide - Castrum Meridianum

Boss Abilities:

Magitek Colossus Rubricatus's Abilities:

  • Grand Sword - (Instant) A frontal cleave which deals ~700-1200 damage.
  • Exhaust - A frontal column of air which deals ~1000-1200 damage.
  • Magitek Field - Grants Rubricatus Vulnerability Down, greatly reducing the damage it takes.
  • Magitek Ray - (Instant) Selects a random player and deals ~600-1000 damage to the player and all nearby players.

8th Cohort Laquearius's Abilities:

  • Overpower - A frontal cone which deals damage.

8th Cohort Medicus's Abilities:

  • Aero - A spellcast which deals ~150 damage.
  • Cure - A spellcast which heals a friendly target.

Magitek Vanguard H-1's Abilities:

  • Overcharge - A frontal cone which deals ~2000 damaage.
  • Drill Cannons - A frontal column which deals ~1000 damage.

As with the previous bosses, the main mechanics here are a frontal and adds. One tank should pick up the Magitek Colossus Rubricatus and tank him at the top left side of the ramp that he spawns on. Healers should stand at the top right side of the ramp. This will pile up all the adds, making them easy to AoE down. Be sure to dodge the Vanguard's Overcharge and Drill Cannons. Other than that, just stay spread out to lower damage taken from Magitek Ray and move out of Exhaust. You can either off-tank the Magitek Vanguard to the side and ignore it, or have the DPS kill it.

The Final Generator
Trash Guide
The Final Generator - Castrum Merdianum

Pick up the imperial identification key and head south towards the final undiscovered area. Opening the Magitek Terminal will reveal rows of Magitek Colossus. Rather than fight them, hug left and head up the ramp to disable the final Searchlight Terminals.

When both are disabled, you will come under fire from an aircraft and two Magitek Colossus will spawn. Each tank should take one of them and face them both away from the group. Kill these first and then use the cannons to bring down the airship.

Final Boss - Round 1
Boss Guide
Final Boss Round 1 Boss Guide - Castrum Meridianum

Boss Abilities:

The Final Boss - Round 1 Abilities:

  • Photon Stream - (Instant) A frontal barrage of bullets, dealing ~400-600 damage. This is the boss' primary attack.
  • Magitek Cannon - A large cicular AoE targeted on a random player which deals ~2000 damage.

This fight is similar to The Black Eft, with a twist. There are Mark XLIII Artillery Cannons with Magitek Missle piles near them. Clicking on one of these piles with trigger a Magitek Loader to carry a missle over to a cannon. A healer or tank should be clicking these piles to load up the cannons while a DPS or Healer tanks the boss in the middle of the room. You can either load up all four cannons and do a count-down to fire them, or just fire them as they're loaded. These should be fired by a DPS or Healer. Once you fire a cannon, move to the middle, as you will have aggro on the boss.

To make using the cannons more difficult, guards will attempt to kill both the Magitek Loader and the Cannons. This is where tanks come into play. One tank should focus on each side, picking up all the adds and dragging them into the middle with the boss. The cannons will deal AoE damage, quickly taking out any adds.

If you have either the boss or an add attacking you, always move to the middle until you no longer have aggro.

Final Boss - Round 2
Boss Guide
Final Boss Round 2 Boss Guide - Castrum Meridianum

Boss Abilities:

The Final Boss - Round 2 Abilities:

  • Delta Trance - (Instant) A melee attack which rapidly strikes the target five times, dealing ~250 damage per strike.
  • Aglaia Bite - (Instant) A melee attack which deals ~600-1000 damage.
  • Roundhouse - (Instant) A whirlwind, dealing ~300-400 damage to all nearby targets.
  • Stunning Sweep - A circular AoE which deals ~1000 damage and inflicts paralysis.
  • Angry Salamander - A frontal column which deals ~1200 damage.
  • Aglaia Climb - A series of frontal blasts which deal ~500 damage each.
  • Order to Attack - Spawns 7th Cohort Soldiers.

7th Cohort Secutor's Abilities:

  • Triple Threat - (Instant) A melee strike which deals ~150 damage.

Magitek Colossus' Abilities:

  • Grand Sword - (Instant) A frontal cleave which deals ~700-1200 damage.
  • Exhaust - A frontal column which deals ~1000-1200 damage.
  • Magitek Ray - (Instant) Selects a random player and deals ~600-1000 damage to the player and all nearby players.

The boss will now fight without Magitek Armor. It will deal higher damage to the tank than before and will have an entirely new set of abilities. Everyone should dodge the abilities Stunning Sweep and Angry Salamander. The ability Aglaia Climb is also avoidable by running behind it, though it does not have a ground indicator.

At 75%, 50%, and 25%, it will use Order to Attack, spawning a large number of 7th Cohort Secutors which will all focus on a single target. If these focus on you, don't move and let everyone AoE them down quickly. At 25%, it will use Order to Attack again, but this time it will spawn a Magitek Colossus along with the Secutors. The offtank can take the Colossus off to a corner and leave the group to focus on the boss. The Colossus will despawn when the boss is defeated.

This boss drops 100 Allagan tomestones of philosophy.