This item is acquired in-game. See its sources below.
A Rare Mail Chest, item level 44, binds when picked up.
First seen in build 12.0.7.68887 (Midnight (patch 12.0.7)).
In the Appearances collection, Thornbrace Chainmail is listed as Quest. Appearance ID: 26610. 21 other items wear the same appearance; 5 of them are listed here.
Read from the World of Warcraft client build files.
Mail is the armor type Evoker, Hunter and Shaman wear. With Agility or Intellect, Thornbrace Chainmail suits Beast Mastery, Marksmanship and Survival Hunter; Elemental, Enhancement and Restoration Shaman; Devastation, Preservation and Augmentation Evoker.
Thornbrace Chainmail is part of the transmog set Dreadthorn Battlegear (Hunter, Shaman and Evoker only). The other 16 pieces:
Dreadroot Linked Belt
Dreadroot Linked Bracers
Dreadroot Linked Gauntlets
Dreadroot Linked Greaves
Dreadroot Linked Helm
Dreadroot Linked Legguards
Dreadroot Linked SpauldersDreadroot Linked VestThornbrace SabatonsThornbrace GauntletsThornbrace HelmThornbrace LeggingsThornbrace SpauldersThornbrace WaistguardThornbrace WristguardsShaladrassil CuirassBuilt from the World of Warcraft client build files and recorded Auction House snapshots.
Thornbrace Chainmail uses icon file 1116924, which 57 other items also use. The 7 closest by item ID:
Lead-Studded Chestguard ID 121654 · Armor - Mail · item level 44Seaspray Vest ID 121417 · Armor - Mail · item level 44Dreadroot Linked Vest ID 121212 · Armor - Mail · item level 44Valdisdall Vest ID 121157 · Armor - Mail · item level 44Hillstride Vest ID 121102 · Armor - Mail · item level 44Faronaar Chain Vest ID 121047 · Armor - Mail · item level 44Brvet's Hauberk of Command ID 129123 · Armor - Mail · item level 44 "Addorned with the captain's various commisions that were later copied by other captains."Blizzard numbers items as they are created, so the named items next to ID 121575 (121567 to 121580) were usually added in the same batch as Thornbrace Chainmail: the same quest line, zone, vendor or reward set.
Galeborn's Oiled Cloak ID 121567 · Armor - Cloth · item level 44
Blessing of the Banshee Queen ID 121568 · Armor · item level 44
Might of the Forsaken ID 121570 · Armor · item level 44
Sylvanas' Barbed Arrow ID 121572 · Armor · item level 44
Rooksguard Breastplate ID 121574 · Armor - Plate · item level 44
Sablehide Vest ID 121576 · Armor - Leather · item level 44
Rooksguard Warboots ID 121577 · Armor - Plate · item level 44
Nightvale Sandals ID 121578 · Armor - Cloth · item level 44Thornbrace Sabatons ID 121579 · Armor - Mail · item level 44
Sablehide Boots ID 121580 · Armor - Leather · item level 44The raw ItemSparse values for item 121575 in the current client build.
Read from the World of Warcraft client build files: Item, ItemSparse, Lock, Holidays, AreaTable and CollectableSourceVendor.
TheWoWDB