First seen in build 12.0.7.68887 (Midnight (patch 12.0.7)).
Related
Imperator's Banner Game Data
Appearance
In the Appearances collection, Imperator's Banner is listed as Boss Drop. Appearance IDs: 125628, 125680, 125641, 125667. 2 other items wear the same appearance:
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Imperator's Banner Compares
Who It Suits
Imperator's Banner carries Agility or Strength or Intellect, the primary stat of Arms, Fury and Protection Warrior; Holy, Protection and Retribution Paladin; Beast Mastery, Marksmanship and Survival Hunter; Assassination, Outlaw and Subtlety Rogue; Discipline, Holy and Shadow Priest; Blood, Frost and Unholy Death Knight; Elemental, Enhancement and Restoration Shaman; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock; Brewmaster, Mistweaver and Windwalker Monk; Balance, Feral, Guardian and Restoration Druid; Havoc, Vengeance and Devourer Demon Hunter; Devastation, Preservation and Augmentation Evoker.
Transmog Sets
Imperator's Banner is part of the transmog set Relentless Rider's Lament (Death Knight only), which the Appearances collection lists in 4 versions. The other 14 pieces:
Blizzard numbers items as they are created, so the named items next to ID 249335 (249330 to 249341) were usually added in the same batch as Imperator's Banner: the same quest line, zone, vendor or reward set.