This item is acquired in-game. See its sources below.
Not sold on the Auction House·Miscellaneous
Raid Finder item.client data
An Epic Miscellaneous, item level 37, requires level 32, binds when picked up. Drops from Hagara the Stormbinder in Dragon Soul and 5 other encounters.
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
Where Shoulders of the Corrupted Conqueror Fits
Other Items Named Shoulders of the Corrupted Conqueror
2 other items in the current build are also called Shoulders of the Corrupted Conqueror. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Items Numbered Next to Shoulders of the Corrupted Conqueror
Blizzard numbers items as they are created, so the named items next to ID 78875 (78870 to 78880) were usually added in the same batch as Shoulders of the Corrupted Conqueror: the same quest line, zone, vendor or reward set.