Fantasy setting where humans are the shortest lived of the fantasy races (elf dwarf etc).
But only humans can do necromancy.
Because the god of death loves us the most.
Because we go to them the soonest.
My sister's hamster escaped and we thought it died until we found it SIX MONTHS LATER living in the walls absolutely thriving. We only discovered him because my dad was convinced we had a poltergeist since he kept hearing scratching and finding his hidden candy stash empty. Dad set up a camera to catch the "ghost" and instead caught Butterscotch, this hamster, squeezing through a hole, stealing a Snickers, and disappearing. We tore open the wall and found a full hamster paradise. He'd stolen socks for bedding, had a stash of probably 50 nuts and candies, and somehow found water from a leaky pipe. He'd GAINED weight. This hamster lived better in our walls than he did in his cage. We tried to put him back in the cage and he looked legitimately depressed, so now Butterscotch free-roams the house and my dad leaves out "tribute" snacks. The hamster runs this house now. We are his subjects.