The Moon, unlike people, revives or rejuvenates every month; or those who live in the Moon are immortal; or the Moon makes decision if people should die forever or regularly revive
Some beings, frog and toad among them, have to overcome an obstacle. This is realized not the way it was planned and as a consequence, people become mortal
Death (also Old Age, Disease, etc.) is a particular person not identical with the Master of the Dead. He kills people usually carrying away their souls
A man tries to join a group of persons who are or become stars (usually the Pleiades) but suffers a reverse; or he pursues the stars to have sexual contact or to be reintegrated with members of his family