Infandus
From Grimoire Yondaris
A hellish plane of turmoil and barbarity, Infandus is the hellish plane that was once half of Celestia, serving as a prison to the wicked three. A terrible place of cruelty, Infandus is the birthplace of devils and demons. A place where the souls of the damned go after death, Infandus is not a place where mortals should tread.
