Yeah, I kinda like that idea. I lost count of how many Rubies I've thrown away since I unlocked SMN, it's a rather pointless item outside of its role in SMN flag quest. Only thing I'm certain I'd hate is lugging around a possible 8 of them. Besides Astral Pot, this would be perfect for for an ammo slot. If they do decide to do something similar to this, it would go straight into a magian trial.