Even an amorphous object wouldn't have much wiggle room within highly ordered solids charged with magic in my professional opinion. If its ability to morph is wholly physical it would be restrained within Ishtalle, an equally morphic material, and if it were magical it would be hampered by the aforementioned magical binding. 

But if it's moot then so be it.

Edit: it's a straight sword, being fired with its edge vertical to the ground.