Because all those ancient texts say that as long as any of the seven spirits is missing, death is inevitable. There's no luck involved.
Chu Feng was not very familiar with the metaphysics of the Three Souls and Seven Spirits before.
This time, he took a harsh cram session, reading books all related to the Three Souls and Seven Spirits.
The more he knew, the more frightened and helpless he felt.
Previously, due to ignorance, he always thought losing one spirit among the seven was no big deal. After all, even if the soul scattered, Chu Feng's Reviving Elixir could bring someone back.
Now that he knows more, he realizes how arrogant and ignorant he was.
A scattered soul can be gathered; a destroyed spirit is surely dead.
This is a saying from the ancient texts. It's verified by countless examples from the past.
