keeps showing up

[senathegreat]

whats this sword?

[Izuna]

thats a bug 
when a class uses a flyer not meant for their
race and ure in simple elements 
it shows up 

no clue how to get rid of it 

[Rikku]

not a bug, and not removable.

[Jyuuma]

I'm fairly certain all the assets shown when using Simple Elements do exist in the game.

I could be wrong but it looks like the Master Sword custom flyer. It could also be one of the regular sword flyers, but without particle effects or something like that xP Hope that helps a little.