Talk:Phoenix Slayer Magic/@comment-27047411-20180219102729

I am confused. One time, I was told/read that Slayer Magic only exist if that creature had appeared in Fairy Tail (my Celestial Slayer Magic was not allowed, since no such as Celestial is in Fairy Tail). However, Phoenixs has also never appeared in the Fairy Tail (except for the movie, but the Phoenix Princess is non-canon). So, how can this magic exist, when Phoenix (in canon) never appeared in the manga or anime?