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"I myself frequently don the guise of my old friend Rahool in order to enter the Tower unremarked." —Fenchurch Everis
This mask can be discarded and reclaimed at the holiday kiosk.
― In-game description

Cryptarch Mask is a mask. It can be obtained randomly from Treasure of Ages or purchased from the Silver Dust Kiosk for 20 Silver Dust.

During Festival of the Lost 2015, the mask could be obtained from Gifts of the Lost or Legacy of the Lost mystery bags.

During Festival of the Lost 2016, the mask could be purchased from Eva Levante for a Full Candy Satchel.