Stone

Stones are a in Xenoblade Chronicles used as a "dummy" item. They are not intended to be obtainable, but rather to fill in space where materials are otherwise required. It is unclear why such space is not simply left blank, as there are many cases where this is done with no effect.

The Stone can be obtained by using Yoink! on a. This is likely an oversight by the developers, as this is the only enemy in the entire game where that is possible despite many drop tables referring to the Stone. This is still possible in the Definitive Edition.