Kovork Kostume is an item from the boss Kovork in the new Arathi Highlands that allows you to temporarily gain the appearance of an ogre. Unfortunately, the item’s drop rate seems to be bugged. While it apparently dropped very commonly initially, it seems to drop very rarely if it all for over a year now. Hopefully we can spread the word and get this fixed.
If this was for some reason intentional, maybe we can convince them to bring this item back.