Waterbender Rarity

Was on a roll today with Rarity being part of the northern watertribe. Though I would conflicted considering her special talent is that of an Earthbender. What do you guys think? 

1000 years ago, The Nightmare Armies were supposed to venture into the north and south to hunt for Sea Ponies for their scales and bones. As the years went on, they decided that it would be better to live with the Sea Ponies than with other ponies. The Sea Ponies taught the Land Ponies about where the best vegetation was and waterbending. Rarity's ancestors were from the northern tribes, where she uses magic for waterbending, which primarily uses but also has an affinity for sediment in the glaciers which she uses for clothes that she makes.