Yay! People likes my stuffz! Yay!
As for the Worldslayer, yeah, it was pretty much meant to be the Magical MacGuffin Weapon(tm). It doesn't really do much else (though, I can only imagine the party trying to get something that a warrior with the Worldslayer is guarding... since they can't be hit by it because it will destroy the other MacGuffin they need!!).
Any thoughts on the other items?