C311 Yin Earth Meridian

The Yin Earth Scripture was originally a Daoist magic item, but later on it also became a buddhist treasure used to cure Yin Evils.

Once upon a time, thousands of years ago, the Yin Scriptures were fought over after the Dao and Buddha families split up. However, in the end, it had mysteriously disappeared.

This is the only one in the world, I think.

It was square, like a compass