A Liche (also spelled Lich and Lych) is a supernatural entity who obtains immortality by having its soul placed within an object seperate from its body. The Liche's body and mind are rendered indestructible unless the object containing the soul is harmed. Although it can be torn or broken, the body can be altered while in theis state and undergoes decomposition until reaching a certain point, where the process seemingly halts. Liches are saturated with and extremely reliant upon magick.

Cabadath is the only Liche thought to be active in the Scientific Realm prior to 6 Days a Stranger.