Lady Inerva Darkvein is a single phase encounter in which the bosses abilities gain additional augmentations over time as Primal Anima Containers slowly fill up over the course of the encounter. Players need to remove these augmentations by draining Anima Containers that are located around the room.

Lady Inerva Darkvein is the third and last boss in the Catacombs wing, and is unlocked by defeating the Hungering Destroyer. 

Lady Inerva Darkvein Quick Tips in Castle Nathria

• Drain the Anima Containers by clicking on them, ideally before and after the boss casts Focus Anima on it, as well as any time it reaches 33%+ energy when not under the Focus Anima effect.

• Expose Desires

  • Tanks: taunt off of one another when you reach two stacks of Warped Desires.

  • 33%: Healers: spot heal players afflicted with the Shared Cognition.

  • 66%: Tanks: move away from the raid when Warped Desires is about to expire, as you explode with Change of Heart.

• Bottled Anima

  • Soak the vial landing locations to avoid triggering an Unleashed Volatility.

  • 33%: Soaking a vial leaves Lingering Anima pools. Don't stand in them.

  • 66%: The vial bounces and lands for a second time. Soak twice.

• Sins and Suffering

  • Shared Suffering players need to cut through each of the three orbs with their beams at the same time.

  • 33%: The orbs are connected with Anima Web beams. Don't stand in these beams.

  • 66%: Anima Web beams rotate around the orb. Dodge the beams.

• Concentrated Anima

  • Move the debuff near to the boss. Tank and kill the add that spawns from it.

  • 33%: The debuffed player is rooted. Move the boss to the player instead.

  • 66%: The debuffed player shoots out Fragments of Shadow orbs when they spawn the add. Dodge these orbs.

A full guide can be found on Wowhead: https://www.wowhead.com/guides/lady-inerva-darkvein-castle-nathria-raid-strategy-guide