I Will Evolve from a Mayfly to Swallowing, and I Will Live Forever

My name is Chen Xu. I traveled through time and became a ephemera that lives and dies. How can I break it if my lifespan is only one day? Fortunately, after awakening the swallowing talent, everything can be swallowed and transformed into its own spiritual power, thereby completing evolution. Starting from the humblest mayfly, evolving into immortality step by step, and finally becoming an immortal immortal who can swallow all the heavens and worlds! … My name is Song Qingyu, the Ice Saint Ancestor among the ten Saint Ancestors. The world I am in is about to be swallowed by the Heaven-Swallowing Demon God. The ten great ancestors of the heavens, headed by the Time Saint Ancestor and the Space Saint Ancestor, reverse time and space at the expense of their own Dao Fruit and send me back to the beginning of the birth of the Heaven-Swallowing Demon God. My only mission after my rebirth is to prevent the birth of the Sky-Swallowing Demon God. At the cost of his own Dao Fruit, the Saint of Karma deduced that the initial form of the Sky-Swallowing Demon God was just a mayfly and was born in a place called the Fusheng Mountains, so I set a fire and burned the mountains to the ground. But the Sky-Swallowing Demon God doesn't seem to die that easily, and the Karma Mirror shows that he has not died. So according to the prompts of the Karma Mirror, I vowed to strangle the Heaven-Swallowing Demon God in his cradle!