If you're going to fuse your sword with another item's image, it won't be tradeable. It'll keep its name, stats, etc.
If you're deciding to use the scorpii's sword's image and fuse it to an item that's tradeable, then yes, it'll be tradeable.
I'm guessing you want to trade the scorpii sword itself. No, it won't be tradeable no matter how many times you fuse it. You can always fuse it and get other weapon images to amuse yourself.
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