Keep the group close to the bosses to soak the orbs. Venom stacks will inflict heavy damage and stun if they get up to 11 stacks. Bloodlust on pull.
Vexhul
Caustic Deluge (Tank)
The tank will be pushed backwards, taking damage and spawning venom orbs. Every player needs to pick up orbs to spread the venom out. If an orb is not picked up, it detonates, giving venom to every player.
Run the venom deluge towards the group to make the venom orbs more accessible.
Venomous Emergence (Dps)
Three adds will emerge in the center pool. They need to be killed immediately, or they will start adding stacks to their targets.
Stir the Depths (Dodge)
Waves of venom will strafe the arena, inflicting venom stacks on touch. Step between the waves to avoid them.
Ithraz
Stone Breaker (Tank)
Ithraz will plan a three step attack, spawning soaks in order, then attacking in that order. The tank needs to hit every soak or the group will be knocked out of position. Tank swap after this ability.
Ithraz will turn to face the next soak before attacking, so you can still get it if you’ve forgotten but are quick enough.
Coiling Ichor (Healer)
Three targets will be afflicted with a dangerous dot. When the dot expires, it will drop a pool of blood on the floor. Take the pool away from the group, but stay within range of your healers. The potential pool shrinks over time and with healing, so be careful of using Divine Shield or other effects that would remove the dot, since that would drop the pool at a larger size.
Ravenous Feast (Soak)
At the end of the cycle (Caustic Deluge, Stone Breaker, Venomous Emergence, Coiling Ichor, Stir the Depths, Ravenous Feast), Ithraz will do a three hit soak attack. Getting hit will remove 1 stack of venom, so it is critical to do so to keep the fight going. You can only remove 1 stack per cycle. After this, the cycle repeats.
Intermission
Routinely, the bosses will submerge and reposition. Ithraz will immediately move to their new position, but Vexhul will do an attack from the middle first. Orbs will circle him in a visual indicator of his attack, and he will shoot a massive laser that will strafe the arena in the indicated rotation.
Wait until you confirm the direction of the laser and then go the other way. If the laser is moving towards Ithraz, turn around and follow behind the laser. If it’s moving away, go straight to the boss.
Be mindful about heavy raid damage during this section. You will likely die if you run away from your healers unprepared.