From the Tanada Temple of Black Water Quest.

Mask of the Depths
This mask was fashioned for its wielder from the broken mask of the Watcher of Black Water.
Value 8,000p
Burden 300
Coverage Head
Armor Levels 360
Slash Average 360
Pierce Average 360
Bludgeon Average 360
Fire Average 324
Cold Average 324
Acid Above Average 342
Electric Below Average 216
Spells Honed Control, Inner Calm, Major Magic Resistace, Nuhmudira's Blessing, Brogard's Defiance
Activations Arcane Lore: 200
Spellcraft 300
Mana 3000, 1/20 sec