Kastïel

Defeat Ula'tek before the Greasy Hatchling breaks in The Venomous Abyss on Normal difficulty or higher.

Complete the raid achievements listed below.

Defeat The Coiled Altar while all players are afflicted by Unnerving Fixation in The Venomous Abyss on Normal difficulty or higher.

Defeat the Twin Fangs after feeding Ithraz the following slimes in order during Ravenous Feast in The Venomous Abyss on Normal difficulty or higher.

Defeat Vashnik after killing the Solidified Snake Venom in The Venomous Abyss on Normal difficulty or higher.

Defeat the Entombed Sentinels after each Sentinel uses Vitriolic Stasis to restore more than half its total health in The Venomous Abyss on Normal difficulty or higher.

Defeat Sszorak while jumping through each ring that appears in The Venomous Abyss on Normal difficulty or higher.

Defeat The Lost Explorers including Hoji in The Venomous Abyss on Normal difficulty or higher.

Defeat Nek'zali, the Soulcoiler after returning Kupamanduka to the Soulcoil Well in The Venomous Abyss on Normal difficulty or higher.

Defeat Vashnik the Malignant in The Venomous Abyss on Mythic difficulty.

Defeat the Entombed Sentinels in The Venomous Abyss on Mythic difficulty.

Defeat Kith'ix in The Unbinding of Kith'ix on Heroic difficulty.

Defeat Kith'ix in The Unbinding of Kith'ix on any difficulty.

Defeat Nymrissa Wavecaller in The Tidebound Grotto on Mythic difficulty.