If they do nothing, they probably don't need a sub. I've seen things outright denied for simplicity and/or redundancy many times. An ancient krayt dragon pearl is still just a krayt dragon pearl; it's canon and it doesn't do anything a krayt dragon pearl doesn't do. ^^
As long as you're not pulling some mythic, legendary artifact of value to a specific group out of thin air, like a canon-famous Jedi Master's old lightsaber or something, usually there's nothing for anyone see fault in.