Here are some fictional Keyblades I drew... Uncolored Versions. Set I Set II Colored Versions. I know they're messy. Set I Set II The End...?
Solara Scythe and Throne Knocker don't look like keyblades at all. They look like normal weapons. A thing most people forget when making their own keyblades for some reason is the fact that they are all basically standard multipurpose swords with a full hand guard, that is the template for every blade ever shown before and I see no reason to throw it out and still call it a keyblade. That aside, these are fine, it's just your Fly Biter looks ugly.
I know this is really late, but Fly Biter is s'posed to look ugly. It was the personification of my dislike of Flies, and also my dislike of Venus Fly-Traps. ;> Too, my concept of a Keyblade is a sword with a heavier-made end to it, as in the end of the blade/weapon will have something special to it that isn't too typical of a normal sword. I find guard to be something that most Keyblades have, but I never thought that it was a requirement. -shrug- Iunno.