“The Asphyx” trailer from 1973.
A Victorian scientist thinks he has recorded in photographs the human soul leaving the body at the moment of death. But, closer examination reveals that the phenomenon in the photographs is moving toward the dying rather than away. What he has captured on film is actually an Asphyx, a spirit from Greek Mythology that acts as a personal grim reaper, coming to claim the soul at death to take it to the afterlife. He is determined to capture his own Asphyx in order to become immortal!