Chamber of Crystal

The Chamber of Crystal was a crystal prison to contain Shosuro who had been possesed by the Lying Darkness.

Togashi
In 82, after four decades of struggling to control the Lying Darkness, Shosuro surrendered herself to Togashi in an attempt to find a cure for her mystical ailment. Although Togashi was unable to remove the Darkness from Shosuro's soul, he constructed a chamber of pure crystal deep beneath Kyuden Togashi to contain Shosuro so that when the Darkness finally took control, it could be contained.