Ancestor of Monster Beasts: Start with a Sky-Swallowing Python

Traveling through another world, others are the Holy Son of the Human Emperor, but I have become an old python that has been sealed for ten thousand years. I am also a dying ancestor with only thirteen old, weak, sick and disabled members left in the whole clan, being hunted by all the races in the world. He looked at the last clan members kneeling under the altar, praying for the manifestation of their ancestors, and then looked at the enemy army outside that was blocking the sky and the sun. This old bone of mine has no choice but to move. Let's start by devouring the red flame tiger vanguard at the door... Tiger Emperor? Real dragon? The Human Saint Emperor? All your flesh and blood are the steps for our clan to climb back to the top of the world! [In this life, I am destiny, and my family is eternity!