The Mask of the Quiet One is an Exotic Gear Piece for Titans in Destiny 2.
It’s a random drop and can sometimes be given as a random quest reward. I received it by completing Shaxx’s Call to Arms quest. It always gives one exotic item but it’s random which one. It can also drop from Heroic Public Events.
Exotic Name: Mask of the Quiet One
Type: Helmet Armor
Item Description: “…”
Special Ability #1: Dreaded Visage — Grants melee, grenade, and class ability energy when damaged. Void ability kills grant health regeneration.
Special Ability #2: Increases this armor’s resilience, allowing you to absorb more damage.
Acquired by: Random drop & random quest reward, also from Heroic Public Events.