Still working on that! Personally I'm working an angle for Fang Man that has him as a would-be dictator after Skeletor left him behind. He constantly fails, but it's all for the good of comedy. Anyway, since he's not exactly formidable, I have it that he has to collect all sorts of artifacts to keep him on par with others....of course that never quite pans out. He gets ahold of the Sword of the Ancients at one point, but since he has no magical capabilities it just amounts to him having a really nice sword that he doesn't need to sharpen. He loses it at one point, and I think that'll lead to it getting stuck in stone.
I still have to watch the episode attached to it: What's it supposed to do, anyway?
After Fang Man, I'm still trying to get an idea of who might use it. I'm thinking Skeletor might get it during his crazy days with the Alcala head. They always show him using a "lightning blade" that can cut through metal like nothin', so I imagine he was carrying around a pretty important sword that he could cast magic through. Why not the Sword of the Ancients? At least for awhile. I kinda want the sword to get around.