The black snake symbolizes male organs, the death of the snake represents the end of things, and the blood in the abdomen refers to women having sex during menstruation.
It can be seen that dreamers are probably women, and they dream around menstruation. Dreams express sexual needs.
What needs to be added is that the cornfield is a hidden place, which can just refer to the characteristics of sex places. Corn is also a symbol of sexual organs. It seems that the dreamer is a woman with sexual experience.