Third boss in The Voidspire. Single target fight with a bunch of spread adds that need to be nuked down. Interrupts are required.
Start in Centre of Room, boss facing away from raid.
Void orbs spawn from two of three possible locations - kill asap. Don't let them reach the boss (move boss away if needed)
Fractured images spawn - casters. Interrupt asap to despawn them.
Blue/purple circle on random players (with marker over them) - get to edge and get dispelled - drops puddle and gives healing absorb.
TANK: Shattering Twilight - taunt swap, tank hit (blue "star" beams around them) runs away from the raid to drop spikes.
TANK: Stacking debuff Instability - be aware. Can swap when it drops if necessary.
When the boss gets to 100 energy he shoots 5 rotating beams and takes increased damage. Move him away from edges/puddles to allow rotation. BLOODLUST. Avoid beams.
Once that phase finishes, he drops a large puddle and starts again. Move boss.
HEROIC:
Killing a void orb puts a dot on the entire raid, so kill them one at a time, letting dot fall off before killing second.
Tank spikes will also spawn on random other players.