This mask can be taken from the remains of Ahzidal, one of four named Dragon Priests on Solstheim. He can be encountered at in the Nordic ruin of Kolbjorn Barrow at the conclusion of the quest "Unearthed".
Ahzidal's unique enchantment is called "Ahzidal's Rage." It grants bonuses to fire damage and resistance:
Dunmer become nearly immune to fire with resistance capped at 85%, providing them with great protection from flames.
|Dragon Priest Masks|
|Skyrim||Hevnoraak • Konahrik • Krosis • Morokei • Nahkriin • Otar • Rahgot • Vokun • Volsung|
|Dragonborn||Ahzidal • Dukaan • Miraak • Zahkriisos|