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This item is a reward from the World of Warcraft Trading Card Game.
Ogre Pinata creates a Pinata on a stand that can be attacked by either faction similar to an attack dummy. Once destroyed it explodes and drops a large pile of Pink Gumball. When Pink Gumball is eaten, player gains a buff that causes player to randomly blow bubbles.
Ogre Pinata also can be found listed on the Black Market Auction House.
Here you can buy Ogre Pinata for EU or US Servers.
Also you'll get guide for receiving Ogre Pinata
After patch 10.2 might will need character transfer for access to BMAH