Annihilationism

doctrine that the soul is not naturally immortal

In Christianity, annihilationism (also known as extinctionism or destructionism) is the belief that after the Last Judgment, all damned humans and fallen angels (demons) including Satan will be totally destroyed and their consciousness extinguished. Annihilationism stands in contrast to both the belief in eternal torment and to the universalist belief that everyone will be saved. Partial annihilationism holds that unsaved humans are obliterated but demonic beings suffer forever.