This is one of the powerful Wyld Rites practiced by followers of the wyld faith(s).
There is a means of eternal life. The spark remains the same, but it moves from one incarnation to the next. One form must perish, for another to take shape. The little cousins of Mog Creoch must break the old form down to minutiae so that it can be rebuilt into something else. The memories of being devoured this way will stay, but you will die and be reborn! Worms devour the victim, then each other till only one, that transforms or finds a host.