The immortal horse that just pops back up alive again? Cool, endless supply of horse meat and hide.
Actually reminds me of a local event. An area farmer had a wild pony on his property and decided to have the animal put down because it was quite old, and seemed in bad shape.
The veterinarian administered a first, and a second dose of euthanasia solution, twice what was needed to kill the animal. It broke away from them and ran away. They expected it to die somewhere in the wild, food for the coyotes.
It returned six months later.
The farmer decided to take matters into his own hands and tried shooting the pony in the head. True to form, it ran away with a bleeding head wound. Several months later it returned, the head wound scarred, but healed.
The farmer tried to kill the pony with an ax, and once again the pony ran away, having gained another bloody head injury.
When the pony returned, the head injury was infected, swarming with maggots. The farmer for some reason remembered compassion and had the vet come out again. The wound was treated, and the pony has since lived there, no longer threatened by the farmer.
As far as I know, the pony is still alive.