From the Tanada Temple of Black Water Quest, introduced during the Intelligent Designs event.

Mask of the Depths
Mask of the Depths
Value: 8,000p
300 Burden Units
This mask was fashioned for its wielder from the broken mask of the Watcher of Black Water.


Armor Level: 360
Covers Head

Casts the following spells: Honed Control, Inner Calm, Major Magic Resistance, Nuhmudira's Blessing, Brogard's Defiance

Armor Level: 360
Slashing: Average (360)
Piercing: Average (360)
Bludgeoning: Average (360)
Fire: Average (324)
Cold: Average (324)
Acid: Above Average (432)
Electric: Below Average (216)

Activation Requirements: Arcane Lore: 200
Spellcraft: 300
Mana: 3000
Mana Cost: 1 point per 20 seconds.

Notes

You give Pau Yajin Mask of the Depths.
Pau Yajin tells you, "Really? You're not interested in this lovely mask? Pity, I find it quite stylish. Still, if you don't want it..."
You've earned 6,891,063 experience.