There are various shrines in Dereth that allow a Player Killer (PK) to regain the protection of Asheron and become a Non Player Killer (NPK).

You are enveloped in a feeling of warmth as you are brought back [sic] protection of Light.

List of Shrines:

File:Adja's Memorial icon.png Adja's Memorial 82.5S 93.4E (Vesayen Isles)
Trothyr's Rest 10.4N 54.9E (Near Rithwic)