Speak with Sinephobis on the Fear Tainted Isle in Tenebrous Tangle at ( -104, 265, 871 ) Copy/waypoint -104, 265, 871. When speaking to him, be subservient and give proper respect.
Harvest five dragon bone parts in The Bonemire, which only spawn if the player is on this step of the quest. They are trackable, spawn in the general area of these locations, and have a short (1-3 minute) respawn timer.
You can also buy these off the broker or be traded them from another player. If you already have the items, you can place them in a harvest depot or sales display and remove them for the update.
You can use the Commission System for this step. If you use the Commission System be sure the person you are commissioning uses their instructions otherwise it will take your instructions.
Return to Sinephobis in the Tenebrous Tangle. ( -104, 265, 871 ) Copy/waypoint -104, 265, 871
Steal the soul of Do'ellin the Young on the Isle of Ravasect in the Bonemire at ( 686, -166, 261 ) Copy/waypoint 686, -166, 261. When Do'ellin gets down to about 10% health, he will break the encounter and appear as an NPC, Do'ellin, with '<Subdued>' under his name. At this point, use an ornate phylactery on him to steal his soul and receive Do'ellin's phylactery.
As you approach the location, he may take a moment to spawn. Start the fight from the waterfall side and/or in the pool, or his knockback might throw you off the island.
High-levels should take care not to one-shot him since he may get stuck at 1% (mentor down to level 65).
Do'ellin <Subdued> will despawn in less than 60 seconds (he'll emote "If this is the way is has to be..." just before depop).
If you accidentally aggro the Subdued version, try using the phylactery on him. If it fails to absorb his soul, you will need to kill him to get Do'ellin the Young to spawn again (~15 minute respawn).
If you have a full inventory, you will not receive Do'ellin's phylactery. You will have to craft another ornate phylactery and fight Do'ellin the Young again.
Return to Sinephobis in the Tenebrous Tangle. ( -104, 265, 871 ) Copy/waypoint -104, 265, 871
Within six minutes, place the rods that you received at the following locations:
Fear Tainted Isle: ( -100, 265, 875 ) Copy/waypoint -100, 265, 875 (next to Sinephobis)
Gazer Isle: ( 755, 459, -103 ) Copy/waypoint 755, 459, -103 (take the cloud from Fear Tainted Isle)
Bixie Isle: ( -506, -60, -853 ) Copy/waypoint -506, -60, -853 (take the cloud from Gazer Isle, to Ravasect Incursion Point, and then to Bixie Isle)
If an issue arises while placing the rods, check the discussion page.
Return to Sinephobis. He will summon Spirit of Do'ellin, a 70^^^ ghost dragon, nearby. Allow Do'ellin to kill the priests of fear, or the quest may bug out. If you kill him prematurely you will have to wait 30 minutes for respawn.
The ghost dragon is considered a massive undercon with a nasty AOE knockback. Get yourself positioned into a corner, where the temple stones and the mountain wall meet together just behind the dragon.