1) mummification and 2) the afterlife. While passing into the afterlife would supposedly make one's spirit immortal, their body itself is dead, and they are no longer on this world
I have noticed, most of ppl here were suggesting change connected with 1 point.
What about second one?
I don't know what changes in code does it require, but I think more about making Immortal a spirit of creature. This doesn't say you anything - I know - this is just an introduction. I understand that skill of creature is its spirit in some way. So NEWAnubis skill would make a target creature skill unchangeble by any spells like ie.: Liquid Shadow, Butterfly Effect, Acceleration...