Not really surprising from what ive seen in mythology its just a unbreakable and sharp sword compared to the others it doesnt match the output of power, Kusanagi has storms, Mjolnir has lightning and the staff i think changes size which is much more useful than being forced to close quarters like excalibur (unless its got some power im unaware of, the wikipedia pages are not very good for displaying powers, we atleasy know the others have powers so its better to be guaranteed to have a cool weapon than gamble on excalibur) @Abdalla1234 (plus researching for a quick poll is tiring so stick with what you know)