Yknow, there are probably a lot of Harry Potter Fanfics with swords out there. What I am wondering is why I haven't seen someone made a magic blade from their wand yet.
I was thinking of the Umbrella spell, and how a wizard or witch can just make an umbrella come out of the tip of the wand. Although this spell doesn't really have a lot of screen time or any useful information, I think this is a good enough excuse to make a spell that can replace it with a weapon of choice.
Honestly, balancing is the only big issue that I can think of. Bringing a sword to a wand fight isn't really a good idea, considering if you can't predict the spell trajectories, you are screwed.
Oh well, I gave you the idea. It's not my problem to fix holes in it. Maybe I'd think of magic deflection with a sword, or combining it with my previous idea somehow.
Unrelated
Man, exams season is finally over for now, I feel so free.