User blog comment:Miskos3/Fairy Tail Episode 253: Tartaros arc: Silver Memories, Review/@comment-24039234-20151003120305/@comment-4999650-20151003120800

Hm I don't think it matters what element of Slaying Magic you learn, it'll still slay them (like how all the Dragon Slayers were able to attack any Dragon, despite the Dragon's element).