The Ancient Path of Immortals and Demons

What about immortals? What about demons? Isn't it possible that the immortal body and the demonic mind can't enter this great road? Looking at the three thousand spiritual worlds and the ancient realm of thousands of miles, which place can't I go to, which place can't I break through?... The road is at the end of the dharma, the ancient dharma is different, the devil's path and the immortal's path, who is the real path?