Arx Corinium Dungeon Guide

Arx Corinium is the third 4-man group dungeon for the Ebonheart Pact in ESO. The dungeon is tuned to level 28-31 players in normal mode, and is located in the western / southwestern part of Shadowfen.

The other alliances can complete this dungeon after first running through their own level 28-31 dungeons: City of Ash and Crypt of Hearts.

This guide explains the boss fights of Arx Corinium in detail & provides strategies to defeat the bosses.

Arx Corinium Overview

You can pick up the dungeon quest within the dungeon. Completing the quest will give you a skill point.

Arx Corinium is filled with giant snakes and Lamia, with the occasional Lurcher thrown in.

Recommended Group setup

Arx Corinium is a ramp up in difficulty from the previous dungeons. A healer will be very helpful, if not necessary. Having a tank is useful for some bosses with heavy melee attacks, but a DPS could easily tank this instance as long as they can keep the bosses facing them.


  • Fanged Menace (miniboss)
  • Ganakton the Tempest
  • Sliklenia the Songstress
  • Matron Ixniaa (miniboss)
  • Ancient Lurcher (miniboss)
  • Sellistrix the Lamia Queen

Normal Mode

Fanged Menace

Level: 31

Health: 11,480

Fanged Menace is the first boss in Arx Corinium. He’s a snake miniboss, and isn’t very difficult as long as you stay away from his health leech ability.

Fanged Menace is surrounded by some adds which you should take care of before focusing on him.

Boss mechanics

  • The tank needs to look out for the heavy melee attack – block it.
  • Fanged Menace has a frontal cone attack ability which knocks back anyone caught in it and deals a high amount of damage.
  • The main thing to look out for is his AOE poison damage ability, which also leeches Health from anyone who gets hit by it. The Fanged Menace will curl up and generate a red circle beneath him. It deals a lot of damage, and can easily heal himself up if you don’t get out in time.

Ganakton the Tempest

Level: 31

Health: 20,884

Ganakton the Tempest is the second boss in Arx Corinium. He can be quite lethal. Spreading apart is beneficial.

Boss mechanics

  • The first ability Ganakton has is his frontal cone lightning breath. This should be easy to avoid.
  • Ganakton periodically electrifies himself and deals a moderate amount of damage to everyone in a few shock pulses. You don’t seem to be able to avoid this – just heal through it.
  • The main and the most dangerous ability Ganakton has is his lightning wave attack. He will target a random player in the group and send a wave of lightning towards him. The wave will deal a high amount of Shock damage and stun anyone caught in it. You shouldn’t stand on top of each other because of this. Just remember that you can get out of the stun with your interrupt / break free ability, if you have the stamina for it.
  • Following the Lightning wave, Ganakton electrifies his tail and sends a bolt of lightning at the same player, dealing a lot of Shock damage and again stunning them on the ground.

Sliklenia the Songstress

Level: 31

Health: 20,884

Sliklenia the Songstress is the third boss in Arx Corinium. If you don’t know what you’re doing, there’s a great chance you’ll wipe here.

Sliklenia has an add with her called Songstress’ Pet which also has 21k health. Songstress’ Pet has an essential role in this fight, and you should NOT kill her.

Boss mechanics

  • The main thing to look out for is Sliklenia’s Song ability. She’ll become stationary and start singing, dealing tons of damage in pulses around the room. This is where Songstress Pet comes in.
  • When Sliklenia starts channeling her Song ability, the Songstress’ Pet creates a sonic shield at a random location in the room. The pet will retreat to the shield – you should follow. You won’t take any damage from the song ability if you stand in the shield. This is also why you should not kill the Pet before Slilenia is dead.
  • Sliklenia has a heavy melee attack which the tank should block.

Matron Ixniaa

Level: 31

Health: 11,480

Matron Ixniaa is the fourth boss in Arx Corinium. She’s a miniboss and doesn’t have much health. She only has one ability to look out for, which can be lethal.

Ixniaa is surrounded by a bunch of adds, you should take them down first.

Boss mechanics

  • Ixniaa periodically targets a random player. She places a red circle beneath the player, and follows up with another circle, which will cover an even bigger area. The inner circle is the one you must avoid – it deals tons of damage and can be lethal if you’re not topped up. The outer circle also deals damage, but is much more manageable.

Ancient Lurcher

Level: 31

Health: 11,480

Ancient Lurcher is the fifth boss in Arx Corinium. Just like the previous miniboss, Ancient Lurcher also has a bunch of adds around him. Kill them before you focus on him.

Boss mechanics

  • Ancient Lurcher casts a red circle beneath him, dealing damage to anyone caught in it. It should be easy to avoid.
  • Ancient Lurcher sometimes targets a random player with a green beam, which deals heavy poison damage.
  • Once Ancient Lurcher drops below 50% Health or so, he enrages and charges himself with Lightning, empowering his AOE ability.

Sellistrix the Lamia Queen

Level: 31

Health: 20,684

Sellistrix the Lamia Queen is the sixth and final boss in Arx Corinium. This fight is pretty interesting, and it’s quite difficult to just brute force through it – you need a strategy.

Pay attention to your surroundings. The room is filled with water, but there are a couple of small islands which are safe to stand on. Staying in the water is bad – that’s the main thing you should know.

Boss mechanics

  • Sellistrix has a frontal cone scream which deals a lot of damage. It’s important that the tank faces Sellistrix away from the rest of the group.
  • Sellistrix periodically charges at random players, dealing a low amount of damage in the process.
  • The main mechanic of the fight is Sellistrix’s lightning attack ability. She will start channeling lightning and target the small islands in the room, marked with red circles. Sometimes you have a safe island to go to, sometimes not. It’s very important that Sellistrix isn’t standing in water when this ability goes off, or the water will become electrified and hurt everyone in it.
  • The lightning attack on the islands does deal a bit of damage, but my experience is that you can heal through it. You can either choose to go from island to island, avoiding the lightning in the process, or just choose one island and stay there for the duration of the fight.
  • The latter option (staying on one island) does require some intensive healing, but it guarantees you won’t get hit by the electrified water and it eliminates the chance of anyone else getting hit by her frontal breath attack than the tank. Moving between the islands always increases the chance of your group getting hit by the frontal attack.
  • Simon Karlsson

    Its West part of the map, NOT east. geez

  • Halmur

    Fixed, thanks. Y u heff to be mad though? Simple mistake.

  • DN Chandelier

    She never attacks her own Island when using the lightning attack. If you stay on the same island as her the attack is irrelevant. @Sellistrix