Avatar: The Last Airbender/The Legend Of Korra x Mortal Kombat Crossover They promised that they would never accept help from an Edenian, especially not from him. But once the Fire Nation attacked and took over their domain, they remembered Y/N, a very powerful Mage who was banished from his Tribe and exiled into Outworld for betraying the Water Tribe, one of the few beings that could help them push the Fire Nation back.