The game's collection data lists Imperial Ghostbinder's Robes as sold by a vendor NPC in Warspear.
Vendor
Zone
Map
Waypoint
Other items it sells
NPC #88569
Warspear
-
-
166
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 5.5.4.69585 (Mists of Pandaria).
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Imperial Ghostbinder's Robes Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Imperial Ghostbinder's Robes suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Transmog Sets
Imperial Ghostbinder's Robes is part of the transmog set Regalia of the Burning Scroll (Mage only). The other 16 pieces:
2 other items in the current build are also called Imperial Ghostbinder's Robes. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Items Numbered Next to Imperial Ghostbinder's Robes
Blizzard numbers items as they are created, so the named items next to ID 87027 (87022 to 87032) were usually added in the same batch as Imperial Ghostbinder's Robes: the same quest line, zone, vendor or reward set.