De Lurker Be'loa

To complete this achievement you will need to summon [npc=149289] during the Stormwall Blockade boss fight. You don’t need to defeat the Lurker.

To summon [npc=149289] you need to click on a fish pool to the left of the docks after the boss has been engaged. Ideally you want only one player staying behind on the docks to summon it. That player will have to deal with a few mechanics for 2 minutes.

Fishing pool location: Image

• After clicking on the pool, the player will start pulling a rope out of the water, and they will start to slowly get pulled towards the water. Walk in the opposite direction to stay on the docks, but don’t walk too far away from the edge or the rope will break.
• 
  
• Shortly after, sea swells will start falling on the player, who will have to dodge them to stay alive.
• 
  
• After that, waves will come crashing onto the docks, and the player pulling the rope will have to dodge them.

This will go on untill the 2-minute rope-pulling cast finishes. The rest of the raid need to perform the boss fight as usual.

[npc=149289] has two abilities:

• [spell=289479] - A frontal cone that will push anyone away, shooting them into the water
• 
  
• [spell=289487] - Pulls all the players towards De Lurker Be’loa, instantly killing those who get too close

To deal with De Lurker Be’loa, you can have a Warlock cast Fear on it every 20 seconds.

If you don't have a Warlock then you can use a Rogue to stun the [spell=289479] or just make a cc rotation.

A note you have to finish the 2minute channel to summon the lurker before the raid pushing 2nd phase otherwise it cancels and despawns

This achievement cannot be soloed. It requires 3 people. Each person on each ship and another one doing the rope.
At level 80 you do not need to avoid anything while holding the rope as you take no damage. However you must make sure you are not pulled into the water otherwise it will fail.
Each player must be on the ship and interupt them from casting on the boss. To do this you must use your silence/interupt abilities. If they have a bubble around them then you must damage them otherwise you cannot interupt them. Killing them will turn them into a ghost which you cannot target and they will continue to summon the boss which will make you fail this.
At level 80 its very hard not to kill them so I suggest taking off your gear or using lower level people to make this easier.
You must also kill the sirens that attack the ship otherwise they will mind control you and walk you off the edge of the ship and you cannot get back up.
This is a very annoying achievement so be prepared to fail a few times before you get the hang of it.