Legend of the Five Rings: Echoes
Though it happens rarely, and no one dares speak of it, powerful maho-tsukai have been known to escape Jigoku, the Realm of Evil, and return once more to the land of men. When they do, the sheer power it takes for their return tears through the realm, leaving what some call Spirit Scars.
They physically appear as gouges in the earth or some nearby object, and they seem to “bleed” shadow. Creatures near the Scars are eventually tainted by Jigoku’s influence, and some become dark guardians of these rifts.
Closing or healing these scars is extremely difficult. In the Realm of Men, a simple Earth kami could close the wound, but it is not healed. The wound exists primarily between Jigoku and another Realm closely associated with the area. For example, in a forest in the Unicorn lands, the scar was ripped through Chikushudo to get to our world. One must travel to this other realm and call upon powerful magics to close the rift at its source.