Becoming a Summoned Beast 300 Million Years Ago

Everyone, the numbers are terrible. I'm stopping updates here~ See you in another book if fate allows!

Xu Xian is an ordinary man who transmigrates to a strange snakefolk kingdom from three hundred million years ago, where a snakefolk girl tells him that she bought him as her summoned beast.

Would he rather be her Pikachu, or strike out on his own and create an era of his own in that world? But things are far from simple. From the very second he arrived in another world, the gears of fate had already begun to turn. What happened next went far beyond anything he could imagine...

How did life begin? Why did civilization rise, and why was it destroyed? Why is the universe so barren everywhere? The answers to everything begin here.