This item is contained in the Smokywood Pastures Special Gift or the Stolen Present.Collect the weapon enchantment appearance of Flames of Ragnaros. It also can be listed on the Black Market Auction House.
Here you can buy Illusion: Flames of Ragnaros for EU or US Servers.
Also you'll get guide for receiving Illusion: Flames of Ragnaros
• Illusion: Flames of Ragnaros
• After patch 10.2 might will need character transfer for access to BMAH
