Creature design for a race called Necrovius in my book.
A small and unpopular folk, secluded to only a few islands which are some of the 'distributors' of leylines and rather isolated from the mainland.
Their actual lifespan is short thanks to severe mutations , disabilities and other physical faults, though when the time of their death comes they (and their clan) pilgrim to the strongest knot(of the ley lines) on the island and let the person's death happen there.
Those of strong enough mind and magic get 'chosen' to live on in their, technically dead, but by magic conserved and animated bodies. Said bodies were created by the same person prior to their death.
It is highly frowned upon to live in a body one hasn't made themselves, or to die and be 'reborn' without witnesses of the clan.