When Discord tastes the rainbow he doesn't get turned to stone like anypony would have expected, instead he simply vanishes. Where did he go? Celestia quite frankly doesn't care, as long as he's gone for good she's happy.

Meanwhile in Republic city, Avatar Korra finds she suddenly has much bigger problems then Amon and his Equalists to deal with. Hilarity ensues.

Needless to say its a crossover with the Legend Of Korra.