

3 phase fight with 2 similar intermissions between each phase.
P1 has 3 Undying Sentinel mobs to kill. P2 has a boss clone to kill (two target ranged cleave) and some adds. P3 is all single target. Intermissions have 99% damage reduction.
Stick together after P1. The platform will begin to break into 3 pieces, splitting entirely by P3.
Use the Silverstrike Arrows to remove crucial buffs on adds that prevent their death.
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The fight begins with 3 Sentinels active on the platform. They each pulse some raid-wide damage.
If no one is in melee range of a Sentinel, their raid-wide damage increases.
Everyone
Aim the arrows at Sentinels
to remove their buff
A couple players will be targeted by Silverstrike Arrows. This arrow shoots straight from the boss with a white line marking the path.
It pierces through enemies and allies, removing void effects from them. Deals damage to players hit.
Aim Silverstrike Arrow through the Sentinels to remove their death immunity.
Everyone
Reposition your character to aim
the lines away from the raid
A circle appears on the ground around a player, as well as 3 obelisks with attached beams. These beams will move as the player moves, shooting away from the player and through the obelisks.
Adjust your position to angle these beams away from the raid.
Other players should move out of the initial circle and away from the beams; both deal damage to anyone hit.
Everyone
Stay near the sentinel
you are focused on
Everyone
Stop casting so
you aren't interrupted
Everyone
Move out
to dodge
Everyone
Kill Droplets on Sentinels
for damage increase
This massive absorb shield needs to be healed off. It can be dispelled, but the remaining absorb will jump to another player and still needs to be healed off.
Avoid dispelling this unless the debuffed player is in danger.
Once the Sentinels die, all players are knocked up and Alleria smashes into the center of the room, deepening the 3 splits on the platform.
Enter the intermission with all players together inside one section. Alleria will take 99% reduced damage during the intermission, so don't worry about hitting her.
Everyone
Fight the drag away
from the center
Players are slowly drawn toward the middle of the tilted platform. This increases in strength.
Players also take raid-wide, ticking damage every 2s. This stacks. Getting hit by a Silverstrike arrow can remove your stacks.
During the pull, some circles mark where orbs will explode. They deal damage and knock players up in the air.
Alleria summons a void clone. If she and her clone are within 30yd of each other, they gain a 10% stacking damage buff.
The phase ends when the clone dies. Try to damage Alleria as much as possible while being sure to kill the clone before the room fills up with puddles.
Everyone
Bait the orb and
move away from it
Everyone
Work together to
aim at the adds
Several players are marked with Ranger Captain's Mark. Instead of each player being targeted with an arrow, there will instead be one single arrow which will bounce between the players.
Break the death immunity to adds.You'll have to work together to aim!
If the add reaches 100 energy before dying, it gains 300% move speed, 500% damage, and immunity to crowd control.
Everyone
Break the shield ASAP
to stop the damage
10s DoT (25s on Heroic) on several players. This can stack.
Use the arrows to remove this DoT.
The clone's tankbuster deals a hit of physical damage and applies a 10% stat reduction debuff for 20s. This stacks. Swap at around 3 stacks.
Because the bosses should remain apart, try to be quick when swapping so they're near each other as little as possible.
Rather than dragging the bosses across to opposite sides, tanks will swap sides to the opposite boss to keep the ranged area of denial on the edges.
10s DoT (25s on Heroic) on several players. This can stack.
Use the arrows to remove this DoT.
The clone's tankbuster deals a hit of physical damage and applies a 10% stat reduction debuff for 20s. This stacks. Swap at around 3 stacks.
Because the bosses should remain apart, try to be quick when swapping so they're near each other as little as possible.
Rather than dragging the bosses across to opposite sides, tanks will swap sides to the opposite boss to keep the ranged area of denial on the edges.
Same as P1.
This massive absorb shield needs to be healed off. It can be dispelled, but the remaining absorb will jump to another player and still need to be healed.
Try to avoid dispelling this unless the debuffed player is in danger.
Once the Simulacrum dies, all players will again be knocked up and Alleria will smash into the center of the room, deepening the 3 splits on the platform.
Enter the intermission with all players together inside one section. Alleria will take 99% reduced damage during the intermission, so don't worry about hitting her.
After this second Intermission, the platforms will split entirely into 3 chunks.
Everyon,
Fight the drag away
from the center
Players are slowly drawn toward the center of the tilted platform. This increases in strength.
Players also take raid-wide, ticking damage every 2s. This stacks. Eating a Silverstrike arrow can remove your stacks.
During the pull, some orbs spin around the room, damaging and drawing in players who touch them.
Finish the boss before Alleria casts Devouring Cosmos 3 times.
She will break the platforms, so pick up a feather and jump across to a new section.
Everyone
Reposition your character to aim
the lines away from the raid
A circle appears on the ground around a player, as well as 3 obelisks with attached beams. These beams move as the player moves, shooting away from the player and through the obelisks. Position your character to angle these beams away from the raid.
Other players should move out of the initial circle and away from the beams. Both will deal damage to anyone hit.
Everyone
Break tethers one at a time
and tank swap
Several players are tethered by an arrow. Tether range is marked by a circle. While tethered, players take 10% reduced healing, which also stacks.
Break the tether by running out of range. Breaking the tether deals raid-wide damage and applies a 300% physical damage taken vulnerability debuff.
One will always be on the active tank, so this is the tank swap mechanic for the phase.
Everyone
Grab a feather and run
to the next platform
Feathers scatter from Alleria's quiver as she calls down void energy to consume the platform.
Each player must pick up a feather and use the buff to jump across to a new section of the platform.
The void energy deals massive damage to any player who touches it.
Same as P1 & P2.
This massive absorb shield needs to be healed off. It can be dispelled, but the remaining absorb will jump to another player and still need to be healed.
Avoid dispelling this unless the debuffed player is in danger.