The game's collection data lists Endowed Mantle as sold by a vendor NPC in Valdrakken.
Vendor
Zone
Map
Waypoint
Other items it sells
NPC #199599
Valdrakken
-
-
792
Vendor NPC, zone and position come from the client's collection source tables (CollectableSourceInfo and CollectableSourceVendorSparse); coordinates are the in-game map readout.
Build history
First seen in build 12.0.7.68887 (Midnight (patch 12.0.7)).
In the Appearances collection, Endowed Mantle is listed as Quest. Appearance IDs: 79387, 79401. No other item uses this appearance, so it is unique to Endowed Mantle.
Read from the World of Warcraft client build files.
Where Endowed Mantle Comes From
Quests That Reward Endowed Mantle
1 quest lists Endowed Mantle among its rewards in Blizzard's quest data.
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Endowed Mantle Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Endowed Mantle suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Transmog Sets
Endowed Mantle is part of the transmog set Endowed Garb (Priest, Mage and Warlock only). The other 8 pieces:
Blizzard numbers items as they are created, so the named items next to ID 204586 (204581 to 204591) were usually added in the same batch as Endowed Mantle: the same quest line, zone, vendor or reward set.