This item is acquired in-game. See its sources below.
In the Appearances collection, Tidewrought Mask is listed as Quest. Appearance ID: 121396. 7 other items wear the same appearance:
Read from the World of Warcraft client build files.
Leather is the armor type Demon Hunter, Druid, Monk and Rogue wear. With Agility or Intellect, Tidewrought Mask suits Assassination, Outlaw and Subtlety Rogue; Brewmaster, Mistweaver and Windwalker Monk; Balance, Feral, Guardian and Restoration Druid; Havoc, Vengeance and Devourer Demon Hunter.
Tidewrought Mask is part of the transmog set Thalassian Leather Armor (Rogue, Monk, Druid and Demon Hunter only). The other 16 pieces:
Burnt Watha'nan Jerkin
Lynxslayer's Leather GlovesEversong Defender's Hood
Twilight Spy's Tights
Belt of Herbicide
Reluctant Diplomat's Wraps
Corrupted Twilight Cowl
Lightstalker's TreadsTwilightbreaker's GlovesZulguard's StompersSkyblessed VestSpiritwarden's Sash
Atalguard's Oath ShoulderpadsGloves of RenewalLight's Hope MantleBuilt from the World of Warcraft client build files and recorded Auction House snapshots.
First-party render from the game files. Model © Blizzard Entertainment.
Tidewrought Mask is not traded on the Auction House, so it has no Auction House price. It is acquired in-game from the sources listed above. This page collects its first-party game data (identity, effects and where it comes from) from the official World of Warcraft client build.
TheWoWDB