Andariel's Visage is a Unique Helm. It can be used by any class.
Andariel's Visage, now classified as a 
Mythic unique item, stands out as a powerhouse helmet particularly tailored for poison-focused builds in Diablo IV. Its most distinctive features include an impressive 666 poison resistance, a high attack speed bonus, and a life leech effect that restores 524 health on hit, making it especially valuable for fast-attacking characters.
The helmet's unique effect has undergone a significant change: the Poison Nova now triggers on enemies rather than on the wearer, dealing massive poison damage over time. This shift is crucial as it allows ranged characters to safely unleash devastating poison effects from a distance, greatly enhancing their combat effectiveness.
Additionally, the item's appearance changes based on the character using it, adding a unique visual flair. Ideal for poison-centric Druids and Rogues, this helmet is a must-have for players looking to maximize their poison damage output. A sorcerer can also make good use of this item by providing an additional damage type for 
Tal Rasha's Iridescent Loop
Effect
Lucky Hit: Up to a 20% chance to trigger a poison nova that applies X Poisoning damage over 5 seconds to enemies in the area.
How to get Andariel's Visage
You can farm this unique from 
Duriel, Maggot King
Andariel, Maiden of Anguish
The horrific whispers of the Maiden of Anguish flicker through your mind, pushing you ever closer to madness...
Legions
Helltide