Before the Deepstone Sentinel, there is a Tetris-like obstacle you have to pass. You have to avoid the green tiles because it damages you. You can dodge and block the green tiles between the safe non glowing tiles, proceed to the end. This can be skipped by Berserker, Soulbeast, Firebrand, like in the video down below.
After two players passed, they stand on the cyan glowing runes to stop the Tetris trap so others can pass. Elementalist can use Lightning Flash to activate both button, a little higher ping helps with this immensely.
After prestacking Might at the Mistlock Singularity move in and the Deepstone Sentinel spawns. The only dangerous attack it has is an AoE tornado (called Wind Sprites) that you have to dodge at every 20%. It is a well telegraphed attack so you only have to make sure you are not standing in it 1 second later. If it manages to catch you, others have to use CC to break you out of it before it floats you to the depths and kill you. There is a possibility you get caught even if you are not standing in it, use Skill 1 to break out of it (If you get caught in it and you stood in the AoE Skill 1 does nothing else than pinging on minimap, so keep that in mind).
The other three attacks are a mini tornado that applies Chilled and the AoEs that Daze, the third attack is a projectile it shoots in-between which can be reflected / absorbed. After killing the Deepstone Sentinel the crystal energy orb spawns, take it and interact with the Vibrant Crystal in the middle.
Commonly the Brood Queen is picked second from the two paths. On your way to the Brood Queen you will see spider nests, destroy them. You have to stand on two cyan glowing runes in the middle of the bridge to unblock the path to the Brood Queen. There are telegraphed wind currents that are unblockable, if you happen to get hit by one it puts you back at the start of the bridge. Kill the two elite Broodmother Spider to spawn the Brood Queen. This boss does not hit hard and most attack are telegraphed. After killing her the crystal energy ball comes down. Take it and you get spawned back in the middle. Take the ball to the Vibrant crystal in the end of the hall.
After merging the second orb with the Vibrant Crystal, you get a Special Action Key skill called
Here you have to use the
After standing on the rune in the middle of the platform it proceeds to go downward. If you didn't step in in time, no worries, there is a cyan glowing rune that teleports you down. As the platform goes down, it stops in the middle and mobs spawn. It's two waves of mobs with first being Veteran Imps only, then an Elite Minotaur and Veteran Imps. Use the
Before fight Pre-stack
Prestack Might and proceed to the boss. The boss has several mechanics. The first you will notice is he is teleporting to a random location of the arena at every 10%. The tiles of the arena can be revealed with the
At 80% and then 40% The Voice teleports away and gains a breakbar while casting beam on you that makes the tiles disappear under you. If you do not manage to break the breakbar fast enough he gains a barrier you have to remove.
At 60% and 20% The Voice teleports to the middle, becoming invulnerable and you have to keep away Spectral Flames from him. Spectral Flames make the tiles disappear under them. Use
After the 20% invulnerability he doesn't teleport away and you can nuke him. After defeating The Voice the fractal is finished.