Pyroxene

Pyroxene is a highly valuable mineral use for magical detection. It is a mineral that is more sensitive to the spirit circuits, but once paired with obsidian, redirects the magical flow into the obsidian tip, and also cancels out pyroxene magical presence. Pyroxene is heavily used in creating games like Materialization Shiritori, due to it being easily bendable to magical abilities.

It was used to create the Spirit Compass during The Great War.